Add menu and submenu in admin with a URL instead of slug?

5 comments

1. This is an old post but can’t you just use wordpress $menu and/or $submenu globals like Oleg suggested in number 2.

   When in doubt copy WordPress:

   wordpress/wp-admin/menu.php

   For example to add link this seems like it would work:

   function add_external_link_admin_submenu() {
       global $submenu;
       $permalink = admin_url( 'edit-tags.php' ).'?taxonomy=category';
       $submenu['options-general.php'][] = array( 'Manage', 'manage_options', $permalink );
   }
   add_action('admin_menu', 'add_external_link_admin_submenu');
   

   You can replace the $permalink = ... with anything

   So this should also work :

   $permalink = 'http://www.example.com';
   

   Also, it’s suggested not to use ‘administrator’ (even though I use it as well. Anyway, read this ticket for alternative solutions.

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2. I don’t recommend you do that.

   Let’s assume your prefix for admin.php is _trigger_me_

   1. Submenu

      <?php
      
      function _clean_url_to_repalce_admin_menu($url, $original_url, $_context){
          if ($url == 'admin.php?page=_trigger_me_'){
              remove_filter('clean_url', '_clean_url_to_repalce_admin_menu', 10);
              //return admin_url('someotherpage.php);
              return 'http://google.com/';
          }
      }
      if (is_admin())
      add_filter('clean_url', '_clean_url_to_repalce_admin_menu', 10, 3);
      

   2. Main Menu

      <?php
      function custom_admin_menu_action_hook(){
          global $menu;
          foreach($menu as $k=>$item){
              if ($item[2] == '_trigger_me_'){
                      $menu[$k][2] = 'http://google.com';
              }
          }
      }
      add_action('admin_menu', 'custom_admin_menu_action_hook', 100);
      

   I call both examples as “hacks”. They possible to do, but better to not do that.

   update.

   if case if satisfied with redirection =)

   <?php
   $hook = add_submenu_page($parent, $title, $menu_title, 'manage_option', 'callback');
   add_action("load-{$hook}", create_function('','
       header("Location:", admin_url("someurl.php?blahblahblah"));
       exit;
   '));
   

   in case if you want to substitute this by taxonomy page (edit-tags.php)

   <?php
   add_action('admin_menu', 'admin_menu_edit_tags_page');
   function admin_menu_edit_tags_page(){
       // please set $YOURPARENTSLUG as parent slug of your menu item (parent of your menu)
       // manage_tags to manage_terms of your taxonomy capability (its visible whan you var_dump($wp_taxonomies[$taxonomyyouwant]));
       add_submenu_page($YOURPARENTSLUG, 'menu', 'title', 'manage_tags',  'edit-tags.php?taxonomy=taxonomy');
   }
   

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3. If your submenu is missing the admin.php?page= prefix, you should register the parent menu first, then the submenu.

   add_action( 'admin_menu', function() {
   
   // Parent menu first
   add_menu_page( 'Page title', 'Menu Title', 'capability', 'parent-slug', 'callback' );
   
   // Then the submenus
   add_submenu_page( 'parent-slug', 'Submenu Page Title', 'Submenu Title', 'capability', 'slug', 'callback' );
   
   } );
   

   Otherwise the link will be just the slug.

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4. Thank you Oleg, your script works but breaks the admin interface (background colors and images all dissappear for any reason).

   But if I have to take this road, I can do this instead:

   function changeUrl()
   {
       $pageURL = 'http://'.$_SERVER["SERVER_NAME"].$_SERVER["REQUEST_URI"];
   
       if ($pageURL == 'http://www.mysite.com/wp-admin/admin.php?page=xxxx')
       {
           header ('location:http://www.mysite.com/wp-admin/edit-tags.php?taxonomy=category');
       }
   }
   add_action( 'admin_menu', 'changeUrl' );
   

   It’s seems curious to me that there is no simple way to link a submenu to any url.
   This kind of redirection is messy…but it works.

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5. Although this is an old problem, I’d like to contribute for consideration this code:

   function mysite_admin_menu() 
   {
     add_menu_page( 'Categories', 'Catégories', 'administrator', 'categories', 'a_function' );
     add_submenu_page( 'categories', 'Manage', 'Manage', 'administrator', 'manage_categories', 'mysite_manage_categories' );
     remove_submenu_page('categories','categories');
   }
   add_action( 'admin_menu', 'mysite_admin_menu' );
   
   function mysite_manage_categories() 
   { 
   
   ?><script>window.location = "<?php echo admin_url('edit-tags.php?taxonomy=category'); ?>";</script><?php 
       }
   

   it uses javascript redirect instead of creating another add_action to redirect via http.

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