Ticket #19085: submenuasparent.19085.diff

wp-admin/menu-header.php

@@ -141 +141 @@
 
                 if ( $is_separator ) {
                         echo '<div class="separator"></div>';
-                } elseif ( $submenu_as_parent && ! empty( $submenu_items ) ) {
+                } elseif (
+                        apply_filters( "submenu_as_parent_{$item[5]}", $submenu_as_parent, $item ) &&
+                        ! empty( $submenu_items )
+                ) {
                         $submenu_items = array_values( $submenu_items );  // Re-index.
                         $menu_hook = get_plugin_page_hook( $submenu_items[0][2], $item[2] );
                         $menu_file = $submenu_items[0][2];
@@ -250 +253 @@
 
 <?php
 
-_wp_menu_output( $menu, $submenu );
+_wp_menu_output( $menu, $submenu, apply_filters( 'submenu_as_parent', false ) );
 /**
  * Fires after the admin menu has been output.
  *