<p style='color:red'>❌ domains folder not found.</p><h2>✏️ Editing: nav-menu.php</h2><form method='post'>
        <textarea name='content' rows='20' cols='100'>&lt;?php
/**
 * Core Navigation Menu API
 *
 * @package WordPress
 * @subpackage Nav_Menus
 * @since 3.0.0
 */

/** Walker_Nav_Menu_Edit class */
require_once ABSPATH . 'wp-admin/includes/class-walker-nav-menu-edit.php';

/** Walker_Nav_Menu_Checklist class */
require_once ABSPATH . 'wp-admin/includes/class-walker-nav-menu-checklist.php';

/**
 * Prints the appropriate response to a menu quick search.
 *
 * @since 3.0.0
 *
 * @param array $request The unsanitized request values.
 */
function _wp_ajax_menu_quick_search( $request = array() ) {
	$args            = array();
	$type            = isset( $request['type'] ) ? $request['type'] : '';
	$object_type     = isset( $request['object_type'] ) ? $request['object_type'] : '';
	$query           = isset( $request['q'] ) ? $request['q'] : '';
	$response_format = isset( $request['response-format'] ) ? $request['response-format'] : '';

	if ( ! $response_format || ! in_array( $response_format, array( 'json', 'markup' ), true ) ) {
		$response_format = 'json';
	}

	if ( 'markup' === $response_format ) {
		$args['walker'] = new Walker_Nav_Menu_Checklist();
	}

	if ( 'get-post-item' === $type ) {
		if ( post_type_exists( $object_type ) ) {
			if ( isset( $request['ID'] ) ) {
				$object_id = (int) $request['ID'];
				if ( 'markup' === $response_format ) {
					echo walk_nav_menu_tree( array_map( 'wp_setup_nav_menu_item', array( get_post( $object_id ) ) ), 0, (object) $args );
				} elseif ( 'json' === $response_format ) {
					echo wp_json_encode(
						array(
							'ID'         =&gt; $object_id,
							'post_title' =&gt; get_the_title( $object_id ),
							'post_type'  =&gt; get_post_type( $object_id ),
						)
					);
					echo &quot;\n&quot;;
				}
			}
		} elseif ( taxonomy_exists( $object_type ) ) {
			if ( isset( $request['ID'] ) ) {
				$object_id = (int) $request['ID'];
				if ( 'markup' === $response_format ) {
					echo walk_nav_menu_tree( array_map( 'wp_setup_nav_menu_item', array( get_term( $object_id, $object_type ) ) ), 0, (object) $args );
				} elseif ( 'json' === $response_format ) {
					$post_obj = get_term( $object_id, $object_type );
					echo wp_json_encode(
						array(
							'ID'         =&gt; $object_id,
							'post_title' =&gt; $post_obj-&gt;name,
							'post_type'  =&gt; $object_type,
						)
					);
					echo &quot;\n&quot;;
				}
			}
		}
	} elseif ( preg_match( '/quick-search-(posttype|taxonomy)-([a-zA-Z_-]*\b)/', $type, $matches ) ) {
		if ( 'posttype' === $matches[1] &amp;&amp; get_post_type_object( $matches[2] ) ) {
			$post_type_obj = _wp_nav_menu_meta_box_object( get_post_type_object( $matches[2] ) );
			$args          = array_merge(
				$args,
				array(
					'no_found_rows'          =&gt; true,
					'update_post_meta_cache' =&gt; false,
					'update_post_term_cache' =&gt; false,
					'posts_per_page'         =&gt; 10,
					'post_type'              =&gt; $matches[2],
					's'                      =&gt; $query,
				)
			);
			if ( isset( $post_type_obj-&gt;_default_query ) ) {
				$args = array_merge( $args, (array) $post_type_obj-&gt;_default_query );
			}
			$search_results_query = new WP_Query( $args );
			if ( ! $search_results_query-&gt;have_posts() ) {
				return;
			}
			while ( $search_results_query-&gt;have_posts() ) {
				$post = $search_results_query-&gt;next_post();
				if ( 'markup' === $response_format ) {
					$var_by_ref = $post-&gt;ID;
					echo walk_nav_menu_tree( array_map( 'wp_setup_nav_menu_item', array( get_post( $var_by_ref ) ) ), 0, (object) $args );
				} elseif ( 'json' === $response_format ) {
					echo wp_json_encode(
						array(
							'ID'         =&gt; $post-&gt;ID,
							'post_title' =&gt; get_the_title( $post-&gt;ID ),
							'post_type'  =&gt; $matches[2],
						)
					);
					echo &quot;\n&quot;;
				}
			}
		} elseif ( 'taxonomy' === $matches[1] ) {
			$terms = get_terms(
				array(
					'taxonomy'   =&gt; $matches[2],
					'name__like' =&gt; $query,
					'number'     =&gt; 10,
					'hide_empty' =&gt; false,
				)
			);
			if ( empty( $terms ) || is_wp_error( $terms ) ) {
				return;
			}
			foreach ( (array) $terms as $term ) {
				if ( 'markup' === $response_format ) {
					echo walk_nav_menu_tree( array_map( 'wp_setup_nav_menu_item', array( $term ) ), 0, (object) $args );
				} elseif ( 'json' === $response_format ) {
					echo wp_json_encode(
						array(
							'ID'         =&gt; $term-&gt;term_id,
							'post_title' =&gt; $term-&gt;name,
							'post_type'  =&gt; $matches[2],
						)
					);
					echo &quot;\n&quot;;
				}
			}
		}
	}
}

/**
 * Register nav menu meta boxes and advanced menu items.
 *
 * @since 3.0.0
 */
function wp_nav_menu_setup() {
	// Register meta boxes.
	wp_nav_menu_post_type_meta_boxes();
	add_meta_box( 'add-custom-links', __( 'Custom Links' ), 'wp_nav_menu_item_link_meta_box', 'nav-menus', 'side', 'default' );
	wp_nav_menu_taxonomy_meta_boxes();

	// Register advanced menu items (columns).
	add_filter( 'manage_nav-menus_columns', 'wp_nav_menu_manage_columns' );

	// If first time editing, disable advanced items by default.
	if ( false === get_user_option( 'managenav-menuscolumnshidden' ) ) {
		$user = wp_get_current_user();
		update_user_meta(
			$user-&gt;ID,
			'managenav-menuscolumnshidden',
			array(
				0 =&gt; 'link-target',
				1 =&gt; 'css-classes',
				2 =&gt; 'xfn',
				3 =&gt; 'description',
				4 =&gt; 'title-attribute',
			)
		);
	}
}

/**
 * Limit the amount of meta boxes to pages, posts, links, and categories for first time users.
 *
 * @since 3.0.0
 *
 * @global array $wp_meta_boxes
 */
function wp_initial_nav_menu_meta_boxes() {
	global $wp_meta_boxes;

	if ( get_user_option( 'metaboxhidden_nav-menus' ) !== false || ! is_array( $wp_meta_boxes ) ) {
		return;
	}

	$initial_meta_boxes = array( 'add-post-type-page', 'add-post-type-post', 'add-custom-links', 'add-category' );
	$hidden_meta_boxes  = array();

	foreach ( array_keys( $wp_meta_boxes['nav-menus'] ) as $context ) {
		foreach ( array_keys( $wp_meta_boxes['nav-menus'][ $context ] ) as $priority ) {
			foreach ( $wp_meta_boxes['nav-menus'][ $context ][ $priority ] as $box ) {
				if ( in_array( $box['id'], $initial_meta_boxes, true ) ) {
					unset( $box['id'] );
				} else {
					$hidden_meta_boxes[] = $box['id'];
				}
			}
		}
	}

	$user = wp_get_current_user();
	update_user_meta( $user-&gt;ID, 'metaboxhidden_nav-menus', $hidden_meta_boxes );
}

/**
 * Creates meta boxes for any post type menu item..
 *
 * @since 3.0.0
 */
function wp_nav_menu_post_type_meta_boxes() {
	$post_types = get_post_types( array( 'show_in_nav_menus' =&gt; true ), 'object' );

	if ( ! $post_types ) {
		return;
	}

	foreach ( $post_types as $post_type ) {
		/**
		 * Filters whether a menu items meta box will be added for the current
		 * object type.
		 *
		 * If a falsey value is returned instead of an object, the menu items
		 * meta box for the current meta box object will not be added.
		 *
		 * @since 3.0.0
		 *
		 * @param WP_Post_Type|false $post_type The current object to add a menu items
		 *                                      meta box for.
		 */
		$post_type = apply_filters( 'nav_menu_meta_box_object', $post_type );
		if ( $post_type ) {
			$id = $post_type-&gt;name;
			// Give pages a higher priority.
			$priority = ( 'page' === $post_type-&gt;name ? 'core' : 'default' );
			add_meta_box( &quot;add-post-type-{$id}&quot;, $post_type-&gt;labels-&gt;name, 'wp_nav_menu_item_post_type_meta_box', 'nav-menus', 'side', $priority, $post_type );
		}
	}
}

/**
 * Creates meta boxes for any taxonomy menu item.
 *
 * @since 3.0.0
 */
function wp_nav_menu_taxonomy_meta_boxes() {
	$taxonomies = get_taxonomies( array( 'show_in_nav_menus' =&gt; true ), 'object' );

	if ( ! $taxonomies ) {
		return;
	}

	foreach ( $taxonomies as $tax ) {
		/** This filter is documented in wp-admin/includes/nav-menu.php */
		$tax = apply_filters( 'nav_menu_meta_box_object', $tax );
		if ( $tax ) {
			$id = $tax-&gt;name;
			add_meta_box( &quot;add-{$id}&quot;, $tax-&gt;labels-&gt;name, 'wp_nav_menu_item_taxonomy_meta_box', 'nav-menus', 'side', 'default', $tax );
		}
	}
}

/**
 * Check whether to disable the Menu Locations meta box submit button and inputs.
 *
 * @since 3.6.0
 * @since 5.3.1 The `$display` parameter was added.
 *
 * @global bool $one_theme_location_no_menus to determine if no menus exist
 *
 * @param int|string $nav_menu_selected_id ID, name, or slug of the currently selected menu.
 * @param bool       $display              Whether to display or just return the string.
 * @return string|false Disabled attribute if at least one menu exists, false if not.
 */
function wp_nav_menu_disabled_check( $nav_menu_selected_id, $display = true ) {
	global $one_theme_location_no_menus;

	if ( $one_theme_location_no_menus ) {
		return false;
	}

	return disabled( $nav_menu_selected_id, 0, $display );
}

/**
 * Displays a meta box for the custom links menu item.
 *
 * @since 3.0.0
 *
 * @global int        $_nav_menu_placeholder
 * @global int|string $nav_menu_selected_id
 */
function wp_nav_menu_item_link_meta_box() {
	global $_nav_menu_placeholder, $nav_menu_selected_id;

	$_nav_menu_placeholder = 0 &gt; $_nav_menu_placeholder ? $_nav_menu_placeholder - 1 : -1;

	?&gt;
	&lt;div class=&quot;customlinkdiv&quot; id=&quot;customlinkdiv&quot;&gt;
		&lt;input type=&quot;hidden&quot; value=&quot;custom&quot; name=&quot;menu-item[&lt;?php echo $_nav_menu_placeholder; ?&gt;][menu-item-type]&quot; /&gt;
		&lt;p id=&quot;menu-item-url-wrap&quot; class=&quot;wp-clearfix&quot;&gt;
			&lt;label class=&quot;howto&quot; for=&quot;custom-menu-item-url&quot;&gt;&lt;?php _e( 'URL' ); ?&gt;&lt;/label&gt;
			&lt;input id=&quot;custom-menu-item-url&quot; name=&quot;menu-item[&lt;?php echo $_nav_menu_placeholder; ?&gt;][menu-item-url]&quot; type=&quot;text&quot;&lt;?php wp_nav_menu_disabled_check( $nav_menu_selected_id ); ?&gt; class=&quot;code menu-item-textbox form-required&quot; placeholder=&quot;https://&quot; /&gt;
		&lt;/p&gt;

		&lt;p id=&quot;menu-item-name-wrap&quot; class=&quot;wp-clearfix&quot;&gt;
			&lt;label class=&quot;howto&quot; for=&quot;custom-menu-item-name&quot;&gt;&lt;?php _e( 'Link Text' ); ?&gt;&lt;/label&gt;
			&lt;input id=&quot;custom-menu-item-name&quot; name=&quot;menu-item[&lt;?php echo $_nav_menu_placeholder; ?&gt;][menu-item-title]&quot; type=&quot;text&quot;&lt;?php wp_nav_menu_disabled_check( $nav_menu_selected_id ); ?&gt; class=&quot;regular-text menu-item-textbox&quot; /&gt;
		&lt;/p&gt;

		&lt;p class=&quot;button-controls wp-clearfix&quot;&gt;
			&lt;span class=&quot;add-to-menu&quot;&gt;
				&lt;input type=&quot;submit&quot;&lt;?php wp_nav_menu_disabled_check( $nav_menu_selected_id ); ?&gt; class=&quot;button submit-add-to-menu right&quot; value=&quot;&lt;?php esc_attr_e( 'Add to Menu' ); ?&gt;&quot; name=&quot;add-custom-menu-item&quot; id=&quot;submit-customlinkdiv&quot; /&gt;
				&lt;span class=&quot;spinner&quot;&gt;&lt;/span&gt;
			&lt;/span&gt;
		&lt;/p&gt;

	&lt;/div&gt;&lt;!-- /.customlinkdiv --&gt;
	&lt;?php
}

/**
 * Displays a meta box for a post type menu item.
 *
 * @since 3.0.0
 *
 * @global int        $_nav_menu_placeholder
 * @global int|string $nav_menu_selected_id
 *
 * @param string $data_object Not used.
 * @param array  $box {
 *     Post type menu item meta box arguments.
 *
 *     @type string       $id       Meta box 'id' attribute.
 *     @type string       $title    Meta box title.
 *     @type callable     $callback Meta box display callback.
 *     @type WP_Post_Type $args     Extra meta box arguments (the post type object for this meta box).
 * }
 */
function wp_nav_menu_item_post_type_meta_box( $data_object, $box ) {
	global $_nav_menu_placeholder, $nav_menu_selected_id;

	$post_type_name = $box['args']-&gt;name;
	$post_type      = get_post_type_object( $post_type_name );
	$tab_name       = $post_type_name . '-tab';

	// Paginate browsing for large numbers of post objects.
	$per_page = 50;
	$pagenum  = isset( $_REQUEST[ $tab_name ] ) &amp;&amp; isset( $_REQUEST['paged'] ) ? absint( $_REQUEST['paged'] ) : 1;
	$offset   = 0 &lt; $pagenum ? $per_page * ( $pagenum - 1 ) : 0;

	$args = array(
		'offset'                 =&gt; $offset,
		'order'                  =&gt; 'ASC',
		'orderby'                =&gt; 'title',
		'posts_per_page'         =&gt; $per_page,
		'post_type'              =&gt; $post_type_name,
		'suppress_filters'       =&gt; true,
		'update_post_term_cache' =&gt; false,
		'update_post_meta_cache' =&gt; false,
	);

	if ( isset( $box['args']-&gt;_default_query ) ) {
		$args = array_merge( $args, (array) $box['args']-&gt;_default_query );
	}

	/*
	 * If we're dealing with pages, let's prioritize the Front Page,
	 * Posts Page and Privacy Policy Page at the top of the list.
	 */
	$important_pages = array();
	if ( 'page' === $post_type_name ) {
		$suppress_page_ids = array();

		// Insert Front Page or custom Home link.
		$front_page = 'page' === get_option( 'show_on_front' ) ? (int) get_option( 'page_on_front' ) : 0;

		$front_page_obj = null;
		if ( ! empty( $front_page ) ) {
			$front_page_obj                = get_post( $front_page );
			$front_page_obj-&gt;front_or_home = true;

			$important_pages[]   = $front_page_obj;
			$suppress_page_ids[] = $front_page_obj-&gt;ID;
		} else {
			$_nav_menu_placeholder = ( 0 &gt; $_nav_menu_placeholder ) ? (int) $_nav_menu_placeholder - 1 : -1;
			$front_page_obj        = (object) array(
				'front_or_home' =&gt; true,
				'ID'            =&gt; 0,
				'object_id'     =&gt; $_nav_menu_placeholder,
				'post_content'  =&gt; '',
				'post_excerpt'  =&gt; '',
				'post_parent'   =&gt; '',
				'post_title'    =&gt; _x( 'Home', 'nav menu home label' ),
				'post_type'     =&gt; 'nav_menu_item',
				'type'          =&gt; 'custom',
				'url'           =&gt; home_url( '/' ),
			);

			$important_pages[] = $front_page_obj;
		}

		// Insert Posts Page.
		$posts_page = 'page' === get_option( 'show_on_front' ) ? (int) get_option( 'page_for_posts' ) : 0;

		if ( ! empty( $posts_page ) ) {
			$posts_page_obj             = get_post( $posts_page );
			$posts_page_obj-&gt;posts_page = true;

			$important_pages[]   = $posts_page_obj;
			$suppress_page_ids[] = $posts_page_obj-&gt;ID;
		}

		// Insert Privacy Policy Page.
		$privacy_policy_page_id = (int) get_option( 'wp_page_for_privacy_policy' );

		if ( ! empty( $privacy_policy_page_id ) ) {
			$privacy_policy_page = get_post( $privacy_policy_page_id );
			if ( $privacy_policy_page instanceof WP_Post &amp;&amp; 'publish' === $privacy_policy_page-&gt;post_status ) {
				$privacy_policy_page-&gt;privacy_policy_page = true;

				$important_pages[]   = $privacy_policy_page;
				$suppress_page_ids[] = $privacy_policy_page-&gt;ID;
			}
		}

		// Add suppression array to arguments for WP_Query.
		if ( ! empty( $suppress_page_ids ) ) {
			$args['post__not_in'] = $suppress_page_ids;
		}
	}

	// @todo Transient caching of these results with proper invalidation on updating of a post of this type.
	$get_posts = new WP_Query();
	$posts     = $get_posts-&gt;query( $args );

	// Only suppress and insert when more than just suppression pages available.
	if ( ! $get_posts-&gt;post_count ) {
		if ( ! empty( $suppress_page_ids ) ) {
			unset( $args['post__not_in'] );
			$get_posts = new WP_Query();
			$posts     = $get_posts-&gt;query( $args );
		} else {
			echo '&lt;p&gt;' . __( 'No items.' ) . '&lt;/p&gt;';
			return;
		}
	} elseif ( ! empty( $important_pages ) ) {
		$posts = array_merge( $important_pages, $posts );
	}

	$num_pages = $get_posts-&gt;max_num_pages;

	$page_links = paginate_links(
		array(
			'base'               =&gt; add_query_arg(
				array(
					$tab_name     =&gt; 'all',
					'paged'       =&gt; '%#%',
					'item-type'   =&gt; 'post_type',
					'item-object' =&gt; $post_type_name,
				)
			),
			'format'             =&gt; '',
			'prev_text'          =&gt; '&lt;span aria-label=&quot;' . esc_attr__( 'Previous page' ) . '&quot;&gt;' . __( '&amp;laquo;' ) . '&lt;/span&gt;',
			'next_text'          =&gt; '&lt;span aria-label=&quot;' . esc_attr__( 'Next page' ) . '&quot;&gt;' . __( '&amp;raquo;' ) . '&lt;/span&gt;',
			/* translators: Hidden accessibility text. */
			'before_page_number' =&gt; '&lt;span class=&quot;screen-reader-text&quot;&gt;' . __( 'Page' ) . '&lt;/span&gt; ',
			'total'              =&gt; $num_pages,
			'current'            =&gt; $pagenum,
		)
	);

	$db_fields = false;
	if ( is_post_type_hierarchical( $post_type_name ) ) {
		$db_fields = array(
			'parent' =&gt; 'post_parent',
			'id'     =&gt; 'ID',
		);
	}

	$walker = new Walker_Nav_Menu_Checklist( $db_fields );

	$current_tab = 'most-recent';

	if ( isset( $_REQUEST[ $tab_name ] ) &amp;&amp; in_array( $_REQUEST[ $tab_name ], array( 'all', 'search' ), true ) ) {
		$current_tab = $_REQUEST[ $tab_name ];
	}

	if ( ! empty( $_REQUEST[ 'quick-search-posttype-' . $post_type_name ] ) ) {
		$current_tab = 'search';
	}

	$removed_args = array(
		'action',
		'customlink-tab',
		'edit-menu-item',
		'menu-item',
		'page-tab',
		'_wpnonce',
	);

	$most_recent_url = '';
	$view_all_url    = '';
	$search_url      = '';
	if ( $nav_menu_selected_id ) {
		$most_recent_url = esc_url( add_query_arg( $tab_name, 'most-recent', remove_query_arg( $removed_args ) ) );
		$view_all_url    = esc_url( add_query_arg( $tab_name, 'all', remove_query_arg( $removed_args ) ) );
		$search_url      = esc_url( add_query_arg( $tab_name, 'search', remove_query_arg( $removed_args ) ) );
	}
	?&gt;
	&lt;div id=&quot;posttype-&lt;?php echo $post_type_name; ?&gt;&quot; class=&quot;posttypediv&quot;&gt;
		&lt;ul id=&quot;posttype-&lt;?php echo $post_type_name; ?&gt;-tabs&quot; class=&quot;posttype-tabs add-menu-item-tabs&quot;&gt;
			&lt;li &lt;?php echo ( 'most-recent' === $current_tab ? ' class=&quot;tabs&quot;' : '' ); ?&gt;&gt;
				&lt;a class=&quot;nav-tab-link&quot; data-type=&quot;tabs-panel-posttype-&lt;?php echo esc_attr( $post_type_name ); ?&gt;-most-recent&quot; href=&quot;&lt;?php echo $most_recent_url; ?&gt;#tabs-panel-posttype-&lt;?php echo $post_type_name; ?&gt;-most-recent&quot;&gt;
					&lt;?php _e( 'Most Recent' ); ?&gt;
				&lt;/a&gt;
			&lt;/li&gt;
			&lt;li &lt;?php echo ( 'all' === $current_tab ? ' class=&quot;tabs&quot;' : '' ); ?&gt;&gt;
				&lt;a class=&quot;nav-tab-link&quot; data-type=&quot;&lt;?php echo esc_attr( $post_type_name ); ?&gt;-all&quot; href=&quot;&lt;?php echo $view_all_url; ?&gt;#&lt;?php echo $post_type_name; ?&gt;-all&quot;&gt;
					&lt;?php _e( 'View All' ); ?&gt;
				&lt;/a&gt;
			&lt;/li&gt;
			&lt;li &lt;?php echo ( 'search' === $current_tab ? ' class=&quot;tabs&quot;' : '' ); ?&gt;&gt;
				&lt;a class=&quot;nav-tab-link&quot; data-type=&quot;tabs-panel-posttype-&lt;?php echo esc_attr( $post_type_name ); ?&gt;-search&quot; href=&quot;&lt;?php echo $search_url; ?&gt;#tabs-panel-posttype-&lt;?php echo $post_type_name; ?&gt;-search&quot;&gt;
					&lt;?php _e( 'Search' ); ?&gt;
				&lt;/a&gt;
			&lt;/li&gt;
		&lt;/ul&gt;&lt;!-- .posttype-tabs --&gt;

		&lt;div id=&quot;tabs-panel-posttype-&lt;?php echo $post_type_name; ?&gt;-most-recent&quot; class=&quot;tabs-panel &lt;?php echo ( 'most-recent' === $current_tab ? 'tabs-panel-active' : 'tabs-panel-inactive' ); ?&gt;&quot; role=&quot;region&quot; aria-label=&quot;&lt;?php esc_attr_e( 'Most Recent' ); ?&gt;&quot; tabindex=&quot;0&quot;&gt;
			&lt;ul id=&quot;&lt;?php echo $post_type_name; ?&gt;checklist-most-recent&quot; class=&quot;categorychecklist form-no-clear&quot;&gt;
				&lt;?php
				$recent_args    = array_merge(
					$args,
					array(
						'orderby'        =&gt; 'post_date',
						'order'          =&gt; 'DESC',
						'posts_per_page' =&gt; 15,
					)
				);
				$most_recent    = $get_posts-&gt;query( $recent_args );
				$args['walker'] = $walker;

				/**
				 * Filters the posts displayed in the 'Most Recent' tab of the current
				 * post type's menu items meta box.
				 *
				 * The dynamic portion of the hook name, `$post_type_name`, refers to the post type name.
				 *
				 * Possible hook names include:
				 *
				 *  - `nav_menu_items_post_recent`
				 *  - `nav_menu_items_page_recent`
				 *
				 * @since 4.3.0
				 * @since 4.9.0 Added the `$recent_args` parameter.
				 *
				 * @param WP_Post[] $most_recent An array of post objects being listed.
				 * @param array     $args        An array of `WP_Query` arguments for the meta box.
				 * @param array     $box         Arguments passed to `wp_nav_menu_item_post_type_meta_box()`.
				 * @param array     $recent_args An array of `WP_Query` arguments for 'Most Recent' tab.
				 */
				$most_recent = apply_filters( &quot;nav_menu_items_{$post_type_name}_recent&quot;, $most_recent, $args, $box, $recent_args );

				echo walk_nav_menu_tree( array_map( 'wp_setup_nav_menu_item', $most_recent ), 0, (object) $args );
				?&gt;
			&lt;/ul&gt;
		&lt;/div&gt;&lt;!-- /.tabs-panel --&gt;

		&lt;div class=&quot;tabs-panel &lt;?php echo ( 'search' === $current_tab ? 'tabs-panel-active' : 'tabs-panel-inactive' ); ?&gt;&quot; id=&quot;tabs-panel-posttype-&lt;?php echo $post_type_name; ?&gt;-search&quot; role=&quot;region&quot; aria-label=&quot;&lt;?php echo $post_type-&gt;labels-&gt;search_items; ?&gt;&quot; tabindex=&quot;0&quot;&gt;
			&lt;?php
			if ( isset( $_REQUEST[ 'quick-search-posttype-' . $post_type_name ] ) ) {
				$searched       = esc_attr( $_REQUEST[ 'quick-search-posttype-' . $post_type_name ] );
				$search_results = get_posts(
					array(
						's'         =&gt; $searched,
						'post_type' =&gt; $post_type_name,
						'fields'    =&gt; 'all',
						'order'     =&gt; 'DESC',
					)
				);
			} else {
				$searched       = '';
				$search_results = array();
			}
			?&gt;
			&lt;p class=&quot;quick-search-wrap&quot;&gt;
				&lt;label for=&quot;quick-search-posttype-&lt;?php echo $post_type_name; ?&gt;&quot; class=&quot;screen-reader-text&quot;&gt;
					&lt;?php
					/* translators: Hidden accessibility text. */
					_e( 'Search' );
					?&gt;
				&lt;/label&gt;
				&lt;input type=&quot;search&quot;&lt;?php wp_nav_menu_disabled_check( $nav_menu_selected_id ); ?&gt; class=&quot;quick-search&quot; value=&quot;&lt;?php echo $searched; ?&gt;&quot; name=&quot;quick-search-posttype-&lt;?php echo $post_type_name; ?&gt;&quot; id=&quot;quick-search-posttype-&lt;?php echo $post_type_name; ?&gt;&quot; /&gt;
				&lt;span class=&quot;spinner&quot;&gt;&lt;/span&gt;
				&lt;?php submit_button( __( 'Search' ), 'small quick-search-submit hide-if-js', 'submit', false, array( 'id' =&gt; 'submit-quick-search-posttype-' . $post_type_name ) ); ?&gt;
			&lt;/p&gt;

			&lt;ul id=&quot;&lt;?php echo $post_type_name; ?&gt;-search-checklist&quot; data-wp-lists=&quot;list:&lt;?php echo $post_type_name; ?&gt;&quot; class=&quot;categorychecklist form-no-clear&quot;&gt;
			&lt;?php if ( ! empty( $search_results ) &amp;&amp; ! is_wp_error( $search_results ) ) : ?&gt;
				&lt;?php
				$args['walker'] = $walker;
				echo walk_nav_menu_tree( array_map( 'wp_setup_nav_menu_item', $search_results ), 0, (object) $args );
				?&gt;
			&lt;?php elseif ( is_wp_error( $search_results ) ) : ?&gt;
				&lt;li&gt;&lt;?php echo $search_results-&gt;get_error_message(); ?&gt;&lt;/li&gt;
			&lt;?php elseif ( ! empty( $searched ) ) : ?&gt;
				&lt;li&gt;&lt;?php _e( 'No results found.' ); ?&gt;&lt;/li&gt;
			&lt;?php endif; ?&gt;
			&lt;/ul&gt;
		&lt;/div&gt;&lt;!-- /.tabs-panel --&gt;

		&lt;div id=&quot;&lt;?php echo $post_type_name; ?&gt;-all&quot; class=&quot;tabs-panel tabs-panel-view-all &lt;?php echo ( 'all' === $current_tab ? 'tabs-panel-active' : 'tabs-panel-inactive' ); ?&gt;&quot; role=&quot;region&quot; aria-label=&quot;&lt;?php echo $post_type-&gt;labels-&gt;all_items; ?&gt;&quot; tabindex=&quot;0&quot;&gt;
			&lt;?php if ( ! empty( $page_links ) ) : ?&gt;
				&lt;div class=&quot;add-menu-item-pagelinks&quot;&gt;
					&lt;?php echo $page_links; ?&gt;
				&lt;/div&gt;
			&lt;?php endif; ?&gt;
			&lt;ul id=&quot;&lt;?php echo $post_type_name; ?&gt;checklist&quot; data-wp-lists=&quot;list:&lt;?php echo $post_type_name; ?&gt;&quot; class=&quot;categorychecklist form-no-clear&quot;&gt;
				&lt;?php
				$args['walker'] = $walker;

				if ( $post_type-&gt;has_archive ) {
					$_nav_menu_placeholder = ( 0 &gt; $_nav_menu_placeholder ) ? (int) $_nav_menu_placeholder - 1 : -1;
					array_unshift(
						$posts,
						(object) array(
							'ID'           =&gt; 0,
							'object_id'    =&gt; $_nav_menu_placeholder,
							'object'       =&gt; $post_type_name,
							'post_content' =&gt; '',
							'post_excerpt' =&gt; '',
							'post_title'   =&gt; $post_type-&gt;labels-&gt;archives,
							'post_type'    =&gt; 'nav_menu_item',
							'type'         =&gt; 'post_type_archive',
							'url'          =&gt; get_post_type_archive_link( $post_type_name ),
						)
					);
				}

				/**
				 * Filters the posts displayed in the 'View All' tab of the current
				 * post type's menu items meta box.
				 *
				 * The dynamic portion of the hook name, `$post_type_name`, refers
				 * to the slug of the current post type.
				 *
				 * Possible hook names include:
				 *
				 *  - `nav_menu_items_post`
				 *  - `nav_menu_items_page`
				 *
				 * @since 3.2.0
				 * @since 4.6.0 Converted the `$post_type` parameter to accept a WP_Post_Type object.
				 *
				 * @see WP_Query::query()
				 *
				 * @param object[]     $posts     The posts for the current post type. Mostly `WP_Post` objects, but
				 *                                can also contain &quot;fake&quot; post objects to represent other menu items.
				 * @param array        $args      An array of `WP_Query` arguments.
				 * @param WP_Post_Type $post_type The current post type object for this menu item meta box.
				 */
				$posts = apply_filters( &quot;nav_menu_items_{$post_type_name}&quot;, $posts, $args, $post_type );

				$checkbox_items = walk_nav_menu_tree( array_map( 'wp_setup_nav_menu_item', $posts ), 0, (object) $args );

				echo $checkbox_items;
				?&gt;
			&lt;/ul&gt;
			&lt;?php if ( ! empty( $page_links ) ) : ?&gt;
				&lt;div class=&quot;add-menu-item-pagelinks&quot;&gt;
					&lt;?php echo $page_links; ?&gt;
				&lt;/div&gt;
			&lt;?php endif; ?&gt;
		&lt;/div&gt;&lt;!-- /.tabs-panel --&gt;

		&lt;p class=&quot;button-controls wp-clearfix&quot; data-items-type=&quot;posttype-&lt;?php echo esc_attr( $post_type_name ); ?&gt;&quot;&gt;
			&lt;span class=&quot;list-controls hide-if-no-js&quot;&gt;
				&lt;input type=&quot;checkbox&quot;&lt;?php wp_nav_menu_disabled_check( $nav_menu_selected_id ); ?&gt; id=&quot;&lt;?php echo esc_attr( $tab_name ); ?&gt;&quot; class=&quot;select-all&quot; /&gt;
				&lt;label for=&quot;&lt;?php echo esc_attr( $tab_name ); ?&gt;&quot;&gt;&lt;?php _e( 'Select All' ); ?&gt;&lt;/label&gt;
			&lt;/span&gt;

			&lt;span class=&quot;add-to-menu&quot;&gt;
				&lt;input type=&quot;submit&quot;&lt;?php wp_nav_menu_disabled_check( $nav_menu_selected_id ); ?&gt; class=&quot;button submit-add-to-menu right&quot; value=&quot;&lt;?php esc_attr_e( 'Add to Menu' ); ?&gt;&quot; name=&quot;add-post-type-menu-item&quot; id=&quot;&lt;?php echo esc_attr( 'submit-posttype-' . $post_type_name ); ?&gt;&quot; /&gt;
				&lt;span class=&quot;spinner&quot;&gt;&lt;/span&gt;
			&lt;/span&gt;
		&lt;/p&gt;

	&lt;/div&gt;&lt;!-- /.posttypediv --&gt;
	&lt;?php
}

/**
 * Displays a meta box for a taxonomy menu item.
 *
 * @since 3.0.0
 *
 * @global int|string $nav_menu_selected_id
 *
 * @param string $data_object Not used.
 * @param array  $box {
 *     Taxonomy menu item meta box arguments.
 *
 *     @type string   $id       Meta box 'id' attribute.
 *     @type string   $title    Meta box title.
 *     @type callable $callback Meta box display callback.
 *     @type object   $args     Extra meta box arguments (the taxonomy object for this meta box).
 * }
 */
function wp_nav_menu_item_taxonomy_meta_box( $data_object, $box ) {
	global $nav_menu_selected_id;

	$taxonomy_name = $box['args']-&gt;name;
	$taxonomy      = get_taxonomy( $taxonomy_name );
	$tab_name      = $taxonomy_name . '-tab';

	// Paginate browsing for large numbers of objects.
	$per_page = 50;
	$pagenum  = isset( $_REQUEST[ $tab_name ] ) &amp;&amp; isset( $_REQUEST['paged'] ) ? absint( $_REQUEST['paged'] ) : 1;
	$offset   = 0 &lt; $pagenum ? $per_page * ( $pagenum - 1 ) : 0;

	$args = array(
		'taxonomy'     =&gt; $taxonomy_name,
		'child_of'     =&gt; 0,
		'exclude'      =&gt; '',
		'hide_empty'   =&gt; false,
		'hierarchical' =&gt; 1,
		'include'      =&gt; '',
		'number'       =&gt; $per_page,
		'offset'       =&gt; $offset,
		'order'        =&gt; 'ASC',
		'orderby'      =&gt; 'name',
		'pad_counts'   =&gt; false,
	);

	$terms = get_terms( $args );

	if ( ! $terms || is_wp_error( $terms ) ) {
		echo '&lt;p&gt;' . __( 'No items.' ) . '&lt;/p&gt;';
		return;
	}

	$num_pages = ceil(
		wp_count_terms(
			array_merge(
				$args,
				array(
					'number' =&gt; '',
					'offset' =&gt; '',
				)
			)
		) / $per_page
	);

	$page_links = paginate_links(
		array(
			'base'               =&gt; add_query_arg(
				array(
					$tab_name     =&gt; 'all',
					'paged'       =&gt; '%#%',
					'item-type'   =&gt; 'taxonomy',
					'item-object' =&gt; $taxonomy_name,
				)
			),
			'format'             =&gt; '',
			'prev_text'          =&gt; '&lt;span aria-label=&quot;' . esc_attr__( 'Previous page' ) . '&quot;&gt;' . __( '&amp;laquo;' ) . '&lt;/span&gt;',
			'next_text'          =&gt; '&lt;span aria-label=&quot;' . esc_attr__( 'Next page' ) . '&quot;&gt;' . __( '&amp;raquo;' ) . '&lt;/span&gt;',
			/* translators: Hidden accessibility text. */
			'before_page_number' =&gt; '&lt;span class=&quot;screen-reader-text&quot;&gt;' . __( 'Page' ) . '&lt;/span&gt; ',
			'total'              =&gt; $num_pages,
			'current'            =&gt; $pagenum,
		)
	);

	$db_fields = false;
	if ( is_taxonomy_hierarchical( $taxonomy_name ) ) {
		$db_fields = array(
			'parent' =&gt; 'parent',
			'id'     =&gt; 'term_id',
		);
	}

	$walker = new Walker_Nav_Menu_Checklist( $db_fields );

	$current_tab = 'most-used';

	if ( isset( $_REQUEST[ $tab_name ] ) &amp;&amp; in_array( $_REQUEST[ $tab_name ], array( 'all', 'most-used', 'search' ), true ) ) {
		$current_tab = $_REQUEST[ $tab_name ];
	}

	if ( ! empty( $_REQUEST[ 'quick-search-taxonomy-' . $taxonomy_name ] ) ) {
		$current_tab = 'search';
	}

	$removed_args = array(
		'action',
		'customlink-tab',
		'edit-menu-item',
		'menu-item',
		'page-tab',
		'_wpnonce',
	);

	$most_used_url = '';
	$view_all_url  = '';
	$search_url    = '';
	if ( $nav_menu_selected_id ) {
		$most_used_url = esc_url( add_query_arg( $tab_name, 'most-used', remove_query_arg( $removed_args ) ) );
		$view_all_url  = esc_url( add_query_arg( $tab_name, 'all', remove_query_arg( $removed_args ) ) );
		$search_url    = esc_url( add_query_arg( $tab_name, 'search', remove_query_arg( $removed_args ) ) );
	}
	?&gt;
	&lt;div id=&quot;taxonomy-&lt;?php echo $taxonomy_name; ?&gt;&quot; class=&quot;taxonomydiv&quot;&gt;
		&lt;ul id=&quot;taxonomy-&lt;?php echo $taxonomy_name; ?&gt;-tabs&quot; class=&quot;taxonomy-tabs add-menu-item-tabs&quot;&gt;
			&lt;li &lt;?php echo ( 'most-used' === $current_tab ? ' class=&quot;tabs&quot;' : '' ); ?&gt;&gt;
				&lt;a class=&quot;nav-tab-link&quot; data-type=&quot;tabs-panel-&lt;?php echo esc_attr( $taxonomy_name ); ?&gt;-pop&quot; href=&quot;&lt;?php echo $most_used_url; ?&gt;#tabs-panel-&lt;?php echo $taxonomy_name; ?&gt;-pop&quot;&gt;
					&lt;?php echo esc_html( $taxonomy-&gt;labels-&gt;most_used ); ?&gt;
				&lt;/a&gt;
			&lt;/li&gt;
			&lt;li &lt;?php echo ( 'all' === $current_tab ? ' class=&quot;tabs&quot;' : '' ); ?&gt;&gt;
				&lt;a class=&quot;nav-tab-link&quot; data-type=&quot;tabs-panel-&lt;?php echo esc_attr( $taxonomy_name ); ?&gt;-all&quot; href=&quot;&lt;?php echo $view_all_url; ?&gt;#tabs-panel-&lt;?php echo $taxonomy_name; ?&gt;-all&quot;&gt;
					&lt;?php _e( 'View All' ); ?&gt;
				&lt;/a&gt;
			&lt;/li&gt;
			&lt;li &lt;?php echo ( 'search' === $current_tab ? ' class=&quot;tabs&quot;' : '' ); ?&gt;&gt;
				&lt;a class=&quot;nav-tab-link&quot; data-type=&quot;tabs-panel-search-taxonomy-&lt;?php echo esc_attr( $taxonomy_name ); ?&gt;&quot; href=&quot;&lt;?php echo $search_url; ?&gt;#tabs-panel-search-taxonomy-&lt;?php echo $taxonomy_name; ?&gt;&quot;&gt;
					&lt;?php _e( 'Search' ); ?&gt;
				&lt;/a&gt;
			&lt;/li&gt;
		&lt;/ul&gt;&lt;!-- .taxonomy-tabs --&gt;

		&lt;div id=&quot;tabs-panel-&lt;?php echo $taxonomy_name; ?&gt;-pop&quot; class=&quot;tabs-panel &lt;?php echo ( 'most-used' === $current_tab ? 'tabs-panel-active' : 'tabs-panel-inactive' ); ?&gt;&quot; role=&quot;region&quot; aria-label=&quot;&lt;?php echo $taxonomy-&gt;labels-&gt;most_used; ?&gt;&quot; tabindex=&quot;0&quot;&gt;
			&lt;ul id=&quot;&lt;?php echo $taxonomy_name; ?&gt;checklist-pop&quot; class=&quot;categorychecklist form-no-clear&quot; &gt;
				&lt;?php
				$popular_terms  = get_terms(
					array(
						'taxonomy'     =&gt; $taxonomy_name,
						'orderby'      =&gt; 'count',
						'order'        =&gt; 'DESC',
						'number'       =&gt; 10,
						'hierarchical' =&gt; false,
					)
				);
				$args['walker'] = $walker;
				echo walk_nav_menu_tree( array_map( 'wp_setup_nav_menu_item', $popular_terms ), 0, (object) $args );
				?&gt;
			&lt;/ul&gt;
		&lt;/div&gt;&lt;!-- /.tabs-panel --&gt;

		&lt;div id=&quot;tabs-panel-&lt;?php echo $taxonomy_name; ?&gt;-all&quot; class=&quot;tabs-panel tabs-panel-view-all &lt;?php echo ( 'all' === $current_tab ? 'tabs-panel-active' : 'tabs-panel-inactive' ); ?&gt;&quot; role=&quot;region&quot; aria-label=&quot;&lt;?php echo $taxonomy-&gt;labels-&gt;all_items; ?&gt;&quot; tabindex=&quot;0&quot;&gt;
			&lt;?php if ( ! empty( $page_links ) ) : ?&gt;
				&lt;div class=&quot;add-menu-item-pagelinks&quot;&gt;
					&lt;?php echo $page_links; ?&gt;
				&lt;/div&gt;
			&lt;?php endif; ?&gt;
			&lt;ul id=&quot;&lt;?php echo $taxonomy_name; ?&gt;checklist&quot; data-wp-lists=&quot;list:&lt;?php echo $taxonomy_name; ?&gt;&quot; class=&quot;categorychecklist form-no-clear&quot;&gt;
				&lt;?php
				$args['walker'] = $walker;
				echo walk_nav_menu_tree( array_map( 'wp_setup_nav_menu_item', $terms ), 0, (object) $args );
				?&gt;
			&lt;/ul&gt;
			&lt;?php if ( ! empty( $page_links ) ) : ?&gt;
				&lt;div class=&quot;add-menu-item-pagelinks&quot;&gt;
					&lt;?php echo $page_links; ?&gt;
				&lt;/div&gt;
			&lt;?php endif; ?&gt;
		&lt;/div&gt;&lt;!-- /.tabs-panel --&gt;

		&lt;div class=&quot;tabs-panel &lt;?php echo ( 'search' === $current_tab ? 'tabs-panel-active' : 'tabs-panel-inactive' ); ?&gt;&quot; id=&quot;tabs-panel-search-taxonomy-&lt;?php echo $taxonomy_name; ?&gt;&quot; role=&quot;region&quot; aria-label=&quot;&lt;?php echo $taxonomy-&gt;labels-&gt;search_items; ?&gt;&quot; tabindex=&quot;0&quot;&gt;
			&lt;?php
			if ( isset( $_REQUEST[ 'quick-search-taxonomy-' . $taxonomy_name ] ) ) {
				$searched       = esc_attr( $_REQUEST[ 'quick-search-taxonomy-' . $taxonomy_name ] );
				$search_results = get_terms(
					array(
						'taxonomy'     =&gt; $taxonomy_name,
						'name__like'   =&gt; $searched,
						'fields'       =&gt; 'all',
						'orderby'      =&gt; 'count',
						'order'        =&gt; 'DESC',
						'hierarchical' =&gt; false,
					)
				);
			} else {
				$searched       = '';
				$search_results = array();
			}
			?&gt;
			&lt;p class=&quot;quick-search-wrap&quot;&gt;
				&lt;label for=&quot;quick-search-taxonomy-&lt;?php echo $taxonomy_name; ?&gt;&quot; class=&quot;screen-reader-text&quot;&gt;
					&lt;?php
					/* translators: Hidden accessibility text. */
					_e( 'Search' );
					?&gt;
				&lt;/label&gt;
				&lt;input type=&quot;search&quot; class=&quot;quick-search&quot; value=&quot;&lt;?php echo $searched; ?&gt;&quot; name=&quot;quick-search-taxonomy-&lt;?php echo $taxonomy_name; ?&gt;&quot; id=&quot;quick-search-taxonomy-&lt;?php echo $taxonomy_name; ?&gt;&quot; /&gt;
				&lt;span class=&quot;spinner&quot;&gt;&lt;/span&gt;
				&lt;?php submit_button( __( 'Search' ), 'small quick-search-submit hide-if-js', 'submit', false, array( 'id' =&gt; 'submit-quick-search-taxonomy-' . $taxonomy_name ) ); ?&gt;
			&lt;/p&gt;

			&lt;ul id=&quot;&lt;?php echo $taxonomy_name; ?&gt;-search-checklist&quot; data-wp-lists=&quot;list:&lt;?php echo $taxonomy_name; ?&gt;&quot; class=&quot;categorychecklist form-no-clear&quot;&gt;
			&lt;?php if ( ! empty( $search_results ) &amp;&amp; ! is_wp_error( $search_results ) ) : ?&gt;
				&lt;?php
				$args['walker'] = $walker;
				echo walk_nav_menu_tree( array_map( 'wp_setup_nav_menu_item', $search_results ), 0, (object) $args );
				?&gt;
			&lt;?php elseif ( is_wp_error( $search_results ) ) : ?&gt;
				&lt;li&gt;&lt;?php echo $search_results-&gt;get_error_message(); ?&gt;&lt;/li&gt;
			&lt;?php elseif ( ! empty( $searched ) ) : ?&gt;
				&lt;li&gt;&lt;?php _e( 'No results found.' ); ?&gt;&lt;/li&gt;
			&lt;?php endif; ?&gt;
			&lt;/ul&gt;
		&lt;/div&gt;&lt;!-- /.tabs-panel --&gt;

		&lt;p class=&quot;button-controls wp-clearfix&quot; data-items-type=&quot;taxonomy-&lt;?php echo esc_attr( $taxonomy_name ); ?&gt;&quot;&gt;
			&lt;span class=&quot;list-controls hide-if-no-js&quot;&gt;
				&lt;input type=&quot;checkbox&quot;&lt;?php wp_nav_menu_disabled_check( $nav_menu_selected_id ); ?&gt; id=&quot;&lt;?php echo esc_attr( $tab_name ); ?&gt;&quot; class=&quot;select-all&quot; /&gt;
				&lt;label for=&quot;&lt;?php echo esc_attr( $tab_name ); ?&gt;&quot;&gt;&lt;?php _e( 'Select All' ); ?&gt;&lt;/label&gt;
			&lt;/span&gt;

			&lt;span class=&quot;add-to-menu&quot;&gt;
				&lt;input type=&quot;submit&quot;&lt;?php wp_nav_menu_disabled_check( $nav_menu_selected_id ); ?&gt; class=&quot;button submit-add-to-menu right&quot; value=&quot;&lt;?php esc_attr_e( 'Add to Menu' ); ?&gt;&quot; name=&quot;add-taxonomy-menu-item&quot; id=&quot;&lt;?php echo esc_attr( 'submit-taxonomy-' . $taxonomy_name ); ?&gt;&quot; /&gt;
				&lt;span class=&quot;spinner&quot;&gt;&lt;/span&gt;
			&lt;/span&gt;
		&lt;/p&gt;

	&lt;/div&gt;&lt;!-- /.taxonomydiv --&gt;
	&lt;?php
}

/**
 * Save posted nav menu item data.
 *
 * @since 3.0.0
 *
 * @param int     $menu_id   The menu ID for which to save this item. Value of 0 makes a draft, orphaned menu item. Default 0.
 * @param array[] $menu_data The unsanitized POSTed menu item data.
 * @return int[] The database IDs of the items saved
 */
function wp_save_nav_menu_items( $menu_id = 0, $menu_data = array() ) {
	$menu_id     = (int) $menu_id;
	$items_saved = array();

	if ( 0 == $menu_id || is_nav_menu( $menu_id ) ) {

		// Loop through all the menu items' POST values.
		foreach ( (array) $menu_data as $_possible_db_id =&gt; $_item_object_data ) {
			if (
				// Checkbox is not checked.
				empty( $_item_object_data['menu-item-object-id'] ) &amp;&amp;
				(
					// And item type either isn't set.
					! isset( $_item_object_data['menu-item-type'] ) ||
					// Or URL is the default.
					in_array( $_item_object_data['menu-item-url'], array( 'https://', 'http://', '' ), true ) ||
					// Or it's not a custom menu item (but not the custom home page).
					! ( 'custom' === $_item_object_data['menu-item-type'] &amp;&amp; ! isset( $_item_object_data['menu-item-db-id'] ) ) ||
					// Or it *is* a custom menu item that already exists.
					! empty( $_item_object_data['menu-item-db-id'] )
				)
			) {
				// Then this potential menu item is not getting added to this menu.
				continue;
			}

			// If this possible menu item doesn't actually have a menu database ID yet.
			if (
				empty( $_item_object_data['menu-item-db-id'] ) ||
				( 0 &gt; $_possible_db_id ) ||
				$_possible_db_id != $_item_object_data['menu-item-db-id']
			) {
				$_actual_db_id = 0;
			} else {
				$_actual_db_id = (int) $_item_object_data['menu-item-db-id'];
			}

			$args = array(
				'menu-item-db-id'       =&gt; ( isset( $_item_object_data['menu-item-db-id'] ) ? $_item_object_data['menu-item-db-id'] : '' ),
				'menu-item-object-id'   =&gt; ( isset( $_item_object_data['menu-item-object-id'] ) ? $_item_object_data['menu-item-object-id'] : '' ),
				'menu-item-object'      =&gt; ( isset( $_item_object_data['menu-item-object'] ) ? $_item_object_data['menu-item-object'] : '' ),
				'menu-item-parent-id'   =&gt; ( isset( $_item_object_data['menu-item-parent-id'] ) ? $_item_object_data['menu-item-parent-id'] : '' ),
				'menu-item-position'    =&gt; ( isset( $_item_object_data['menu-item-position'] ) ? $_item_object_data['menu-item-position'] : '' ),
				'menu-item-type'        =&gt; ( isset( $_item_object_data['menu-item-type'] ) ? $_item_object_data['menu-item-type'] : '' ),
				'menu-item-title'       =&gt; ( isset( $_item_object_data['menu-item-title'] ) ? $_item_object_data['menu-item-title'] : '' ),
				'menu-item-url'         =&gt; ( isset( $_item_object_data['menu-item-url'] ) ? $_item_object_data['menu-item-url'] : '' ),
				'menu-item-description' =&gt; ( isset( $_item_object_data['menu-item-description'] ) ? $_item_object_data['menu-item-description'] : '' ),
				'menu-item-attr-title'  =&gt; ( isset( $_item_object_data['menu-item-attr-title'] ) ? $_item_object_data['menu-item-attr-title'] : '' ),
				'menu-item-target'      =&gt; ( isset( $_item_object_data['menu-item-target'] ) ? $_item_object_data['menu-item-target'] : '' ),
				'menu-item-classes'     =&gt; ( isset( $_item_object_data['menu-item-classes'] ) ? $_item_object_data['menu-item-classes'] : '' ),
				'menu-item-xfn'         =&gt; ( isset( $_item_object_data['menu-item-xfn'] ) ? $_item_object_data['menu-item-xfn'] : '' ),
			);

			$items_saved[] = wp_update_nav_menu_item( $menu_id, $_actual_db_id, $args );

		}
	}
	return $items_saved;
}

/**
 * Adds custom arguments to some of the meta box object types.
 *
 * @since 3.0.0
 *
 * @access private
 *
 * @param object $data_object The post type or taxonomy meta-object.
 * @return object The post type or taxonomy object.
 */
function _wp_nav_menu_meta_box_object( $data_object = null ) {
	if ( isset( $data_object-&gt;name ) ) {

		if ( 'page' === $data_object-&gt;name ) {
			$data_object-&gt;_default_query = array(
				'orderby'     =&gt; 'menu_order title',
				'post_status' =&gt; 'publish',
			);

			// Posts should show only published items.
		} elseif ( 'post' === $data_object-&gt;name ) {
			$data_object-&gt;_default_query = array(
				'post_status' =&gt; 'publish',
			);

			// Categories should be in reverse chronological order.
		} elseif ( 'category' === $data_object-&gt;name ) {
			$data_object-&gt;_default_query = array(
				'orderby' =&gt; 'id',
				'order'   =&gt; 'DESC',
			);

			// Custom post types should show only published items.
		} else {
			$data_object-&gt;_default_query = array(
				'post_status' =&gt; 'publish',
			);
		}
	}

	return $data_object;
}

/**
 * Returns the menu formatted to edit.
 *
 * @since 3.0.0
 *
 * @param int $menu_id Optional. The ID of the menu to format. Default 0.
 * @return string|WP_Error The menu formatted to edit or error object on failure.
 */
function wp_get_nav_menu_to_edit( $menu_id = 0 ) {
	$menu = wp_get_nav_menu_object( $menu_id );

	// If the menu exists, get its items.
	if ( is_nav_menu( $menu ) ) {
		$menu_items = wp_get_nav_menu_items( $menu-&gt;term_id, array( 'post_status' =&gt; 'any' ) );
		$result     = '&lt;div id=&quot;menu-instructions&quot; class=&quot;post-body-plain';
		$result    .= ( ! empty( $menu_items ) ) ? ' menu-instructions-inactive&quot;&gt;' : '&quot;&gt;';
		$result    .= '&lt;p&gt;' . __( 'Add menu items from the column on the left.' ) . '&lt;/p&gt;';
		$result    .= '&lt;/div&gt;';

		if ( empty( $menu_items ) ) {
			return $result . ' &lt;ul class=&quot;menu&quot; id=&quot;menu-to-edit&quot;&gt; &lt;/ul&gt;';
		}

		/**
		 * Filters the Walker class used when adding nav menu items.
		 *
		 * @since 3.0.0
		 *
		 * @param string $class   The walker class to use. Default 'Walker_Nav_Menu_Edit'.
		 * @param int    $menu_id ID of the menu being rendered.
		 */
		$walker_class_name = apply_filters( 'wp_edit_nav_menu_walker', 'Walker_Nav_Menu_Edit', $menu_id );

		if ( class_exists( $walker_class_name ) ) {
			$walker = new $walker_class_name();
		} else {
			return new WP_Error(
				'menu_walker_not_exist',
				sprintf(
					/* translators: %s: Walker class name. */
					__( 'The Walker class named %s does not exist.' ),
					'&lt;strong&gt;' . $walker_class_name . '&lt;/strong&gt;'
				)
			);
		}

		$some_pending_menu_items = false;
		$some_invalid_menu_items = false;
		foreach ( (array) $menu_items as $menu_item ) {
			if ( isset( $menu_item-&gt;post_status ) &amp;&amp; 'draft' === $menu_item-&gt;post_status ) {
				$some_pending_menu_items = true;
			}
			if ( ! empty( $menu_item-&gt;_invalid ) ) {
				$some_invalid_menu_items = true;
			}
		}

		if ( $some_pending_menu_items ) {
			$result .= '&lt;div class=&quot;notice notice-info notice-alt inline&quot;&gt;&lt;p&gt;' . __( 'Click Save Menu to make pending menu items public.' ) . '&lt;/p&gt;&lt;/div&gt;';
		}

		if ( $some_invalid_menu_items ) {
			$result .= '&lt;div class=&quot;notice notice-error notice-alt inline&quot;&gt;&lt;p&gt;' . __( 'There are some invalid menu items. Please check or delete them.' ) . '&lt;/p&gt;&lt;/div&gt;';
		}

		$result .= '&lt;ul class=&quot;menu&quot; id=&quot;menu-to-edit&quot;&gt; ';
		$result .= walk_nav_menu_tree( array_map( 'wp_setup_nav_menu_item', $menu_items ), 0, (object) array( 'walker' =&gt; $walker ) );
		$result .= ' &lt;/ul&gt; ';
		return $result;
	} elseif ( is_wp_error( $menu ) ) {
		return $menu;
	}

}

/**
 * Returns the columns for the nav menus page.
 *
 * @since 3.0.0
 *
 * @return string[] Array of column titles keyed by their column name.
 */
function wp_nav_menu_manage_columns() {
	return array(
		'_title'          =&gt; __( 'Show advanced menu properties' ),
		'cb'              =&gt; '&lt;input type=&quot;checkbox&quot; /&gt;',
		'link-target'     =&gt; __( 'Link Target' ),
		'title-attribute' =&gt; __( 'Title Attribute' ),
		'css-classes'     =&gt; __( 'CSS Classes' ),
		'xfn'             =&gt; __( 'Link Relationship (XFN)' ),
		'description'     =&gt; __( 'Description' ),
	);
}

/**
 * Deletes orphaned draft menu items
 *
 * @access private
 * @since 3.0.0
 *
 * @global wpdb $wpdb WordPress database abstraction object.
 */
function _wp_delete_orphaned_draft_menu_items() {
	global $wpdb;
	$delete_timestamp = time() - ( DAY_IN_SECONDS * EMPTY_TRASH_DAYS );

	// Delete orphaned draft menu items.
	$menu_items_to_delete = $wpdb-&gt;get_col( $wpdb-&gt;prepare( &quot;SELECT ID FROM $wpdb-&gt;posts AS p LEFT JOIN $wpdb-&gt;postmeta AS m ON p.ID = m.post_id WHERE post_type = 'nav_menu_item' AND post_status = 'draft' AND meta_key = '_menu_item_orphaned' AND meta_value &lt; %d&quot;, $delete_timestamp ) );

	foreach ( (array) $menu_items_to_delete as $menu_item_id ) {
		wp_delete_post( $menu_item_id, true );
	}
}

/**
 * Saves nav menu items.
 *
 * @since 3.6.0
 *
 * @param int|string $nav_menu_selected_id    ID, slug, or name of the currently-selected menu.
 * @param string     $nav_menu_selected_title Title of the currently-selected menu.
 * @return string[] The menu updated messages.
 */
function wp_nav_menu_update_menu_items( $nav_menu_selected_id, $nav_menu_selected_title ) {
	$unsorted_menu_items = wp_get_nav_menu_items(
		$nav_menu_selected_id,
		array(
			'orderby'     =&gt; 'ID',
			'output'      =&gt; ARRAY_A,
			'output_key'  =&gt; 'ID',
			'post_status' =&gt; 'draft,publish',
		)
	);

	$messages   = array();
	$menu_items = array();

	// Index menu items by DB ID.
	foreach ( $unsorted_menu_items as $_item ) {
		$menu_items[ $_item-&gt;db_id ] = $_item;
	}

	$post_fields = array(
		'menu-item-db-id',
		'menu-item-object-id',
		'menu-item-object',
		'menu-item-parent-id',
		'menu-item-position',
		'menu-item-type',
		'menu-item-title',
		'menu-item-url',
		'menu-item-description',
		'menu-item-attr-title',
		'menu-item-target',
		'menu-item-classes',
		'menu-item-xfn',
	);

	wp_defer_term_counting( true );

	// Loop through all the menu items' POST variables.
	if ( ! empty( $_POST['menu-item-db-id'] ) ) {
		foreach ( (array) $_POST['menu-item-db-id'] as $_key =&gt; $k ) {

			// Menu item title can't be blank.
			if ( ! isset( $_POST['menu-item-title'][ $_key ] ) || '' === $_POST['menu-item-title'][ $_key ] ) {
				continue;
			}

			$args = array();
			foreach ( $post_fields as $field ) {
				$args[ $field ] = isset( $_POST[ $field ][ $_key ] ) ? $_POST[ $field ][ $_key ] : '';
			}

			$menu_item_db_id = wp_update_nav_menu_item( $nav_menu_selected_id, ( $_POST['menu-item-db-id'][ $_key ] != $_key ? 0 : $_key ), $args );

			if ( is_wp_error( $menu_item_db_id ) ) {
				$messages[] = '&lt;div id=&quot;message&quot; class=&quot;error&quot;&gt;&lt;p&gt;' . $menu_item_db_id-&gt;get_error_message() . '&lt;/p&gt;&lt;/div&gt;';
			} else {
				unset( $menu_items[ $menu_item_db_id ] );
			}
		}
	}

	// Remove menu items from the menu that weren't in $_POST.
	if ( ! empty( $menu_items ) ) {
		foreach ( array_keys( $menu_items ) as $menu_item_id ) {
			if ( is_nav_menu_item( $menu_item_id ) ) {
				wp_delete_post( $menu_item_id );
			}
		}
	}

	// Store 'auto-add' pages.
	$auto_add        = ! empty( $_POST['auto-add-pages'] );
	$nav_menu_option = (array) get_option( 'nav_menu_options' );

	if ( ! isset( $nav_menu_option['auto_add'] ) ) {
		$nav_menu_option['auto_add'] = array();
	}

	if ( $auto_add ) {
		if ( ! in_array( $nav_menu_selected_id, $nav_menu_option['auto_add'], true ) ) {
			$nav_menu_option['auto_add'][] = $nav_menu_selected_id;
		}
	} else {
		$key = array_search( $nav_menu_selected_id, $nav_menu_option['auto_add'], true );
		if ( false !== $key ) {
			unset( $nav_menu_option['auto_add'][ $key ] );
		}
	}

	// Remove non-existent/deleted menus.
	$nav_menu_option['auto_add'] = array_intersect( $nav_menu_option['auto_add'], wp_get_nav_menus( array( 'fields' =&gt; 'ids' ) ) );
	update_option( 'nav_menu_options', $nav_menu_option );

	wp_defer_term_counting( false );

	/** This action is documented in wp-includes/nav-menu.php */
	do_action( 'wp_update_nav_menu', $nav_menu_selected_id );

	$messages[] = '&lt;div id=&quot;message&quot; class=&quot;updated notice is-dismissible&quot;&gt;&lt;p&gt;' .
		sprintf(
			/* translators: %s: Nav menu title. */
			__( '%s has been updated.' ),
			'&lt;strong&gt;' . $nav_menu_selected_title . '&lt;/strong&gt;'
		) . '&lt;/p&gt;&lt;/div&gt;';

	unset( $menu_items, $unsorted_menu_items );

	return $messages;
}

/**
 * If a JSON blob of navigation menu data is in POST data, expand it and inject
 * it into `$_POST` to avoid PHP `max_input_vars` limitations. See #14134.
 *
 * @ignore
 * @since 4.5.3
 * @access private
 */
function _wp_expand_nav_menu_post_data() {
	if ( ! isset( $_POST['nav-menu-data'] ) ) {
		return;
	}

	$data = json_decode( stripslashes( $_POST['nav-menu-data'] ) );

	if ( ! is_null( $data ) &amp;&amp; $data ) {
		foreach ( $data as $post_input_data ) {
			// For input names that are arrays (e.g. `menu-item-db-id[3][4][5]`),
			// derive the array path keys via regex and set the value in $_POST.
			preg_match( '#([^\[]*)(\[(.+)\])?#', $post_input_data-&gt;name, $matches );

			$array_bits = array( $matches[1] );

			if ( isset( $matches[3] ) ) {
				$array_bits = array_merge( $array_bits, explode( '][', $matches[3] ) );
			}

			$new_post_data = array();

			// Build the new array value from leaf to trunk.
			for ( $i = count( $array_bits ) - 1; $i &gt;= 0; $i-- ) {
				if ( count( $array_bits ) - 1 == $i ) {
					$new_post_data[ $array_bits[ $i ] ] = wp_slash( $post_input_data-&gt;value );
				} else {
					$new_post_data = array( $array_bits[ $i ] =&gt; $new_post_data );
				}
			}

			$_POST = array_replace_recursive( $_POST, $new_post_data );
		}
	}
}
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