至于Wordpress 4.4，我必须使用以下代码才能工作：

function adjust_admin_menu() {
  global $menu;

  remove_submenu_page( \'themes.php\', \'nav-menus.php\' );

  // Add nav menu as top element
  $menu[31] = array( __( \'Menus\', \'theme-slug\' ), \'edit_theme_options\', \'nav-menus.php\', __( \'Menus\', \'theme-slug\' ), \'menu-top menu-nav\', \'menu-nav\', \'dashicons-menu\');  
}
add_action( \'admin_menu\', \'adjust_admin_menu\' );

这是一篇很好的文章，有助于解决这个问题的旧链接，http://wpengineer.com/475/top-level-menu-in-wordpress-27/

此外，@Norcross提出的解决方案也很有效，但图标99会抛出一个错误，您可以将其留空，例如。\'\' 而不是99。您还可以使用basename(__FILE__) 和文件名。

您可以使用menu\\u order filter更改顺序：

function custom_menu_order($menu_ord) {  
if (!$menu_ord) return true;  

return array(  
    \'index.php\', // Dashboard  
    \'edit.php\', // Posts 
    \'upload.php\', // Media
    \'edit.php?post_type=page\', // Pages
    \'edit-comments.php\', // Comments 
    \'link-manager.php\', // Links 
    \'separator1\', // First separator  
    \'nav-menus.php\', // Navigation
    \'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\');

请注意nav菜单。php已添加到顶级菜单。要重新定位每个菜单项，只需重新排列它们。

如果像OP一样，您只想将菜单和小部件从外观移到顶层，那就更简单了。这也是我所需要的。

因为我们只是移动WP核心菜单项，所以不需要使用add_menu_page 要重新添加菜单项，我们不会添加任何新菜单项。只需从$子菜单数组中取消设置它们，然后在$菜单数组的其他位置重新设置它们。

function re_sort_menu() {
  global $menu;
  global $submenu;
  // Note: find the position of every submenu in Appearance by uncommenting the following: 
  // print_r($submenu[\'themes.php\'];
  unset($submenu[\'themes.php\'][10]); // Unsets Appearance -> Menu (position 10)
  unset($submenu[\'themes.php\'][7]); // Unsets Appearance -> Widgets

  // Add Menu and Widgets back at top level with some dashicons
  // Be careful not to give menu positions (array keys) that conflict with other menu items
  // TIP: print_r($menu); to see existing menu positions and also to check out the proper order of these array values. WP docu seems to list them in the incorrect order.
  $menu[31] = array( __( \'Menus\', \'theme-slug\' ), \'edit_themes\', \'nav-menus.php\', __( \'Menus\', \'theme-slug\' ), \'menu-top menu-nav\', \'menu-nav\', \'dashicons-menu\');  
  $menu[32] = array( __( \'Widgets\', \'theme-slug\' ), \'edit_themes\', \'widgets.php\', __( \'Widgets\', \'theme-slug\' ), \'menu-top menu-nav\', \'menu-nav\', \'dashicons-admin-generic\');  
}
add_action( \'admin_menu\', \'re_sort_menu\' );

add_action( \'admin_menu\', \'dashboard_remove_menu_pages\' );
function dashboard_remove_menu_pages() {
     remove_submenu_page( \'themes.php\', \'nav-menus.php\' );
     add_menu_page(\'Menu\', \'Menu\', \'edit_themes\', \'nav-menus.php\', \'\' , \'dashicons-menu\', 3);
        }

add_menu_page( string $page_title, string $menu_title, string $capability, string $menu_slug, callable $function = \'\', string $icon_url = \'\', int $position = null )