Changing the Order of Admin Menu Sections? - WordPress Development Stack Exchange

  // Rearrange the admin menu
  function custom_menu_order($menu_ord) {
    if (!$menu_ord) return true;
    return array(
      'index.php', // Dashboard
      'edit.php?post_type=custom_type_one', // Custom type one
      'edit.php?post_type=custom_type_two', // Custom type two
      'edit.php?post_type=custom_type_three', // Custom type three
      'edit.php?post_type=custom_type_four', // Custom type four
      'edit.php?post_type=custom_type_five', // Custom type five
      'separator1', // First separator
      'edit.php?post_type=page', // Pages
      'edit.php', // Posts
      'upload.php', // Media
      'link-manager.php', // Links
      'edit-comments.php', // Comments
      'separator2', // Second separator
      'themes.php', // Appearance
      'plugins.php', // Plugins
      'users.php', // Users
      'tools.php', // Tools
      'options-general.php', // Settings
      'separator-last', // Last separator
    );
  }

  add_filter('custom_menu_order', 'custom_menu_order'); // Activate custom_menu_order
  add_filter('menu_order', 'custom_menu_order');