好消息是我已经找到了解决办法。坏消息是菜单必须手动创建。它将使用add_menu_page 和add_submenu_page 功能。codex页面具有函数的格式。

菜单是

add_action( \'admin_menu\', \'register_my_custom_menu_page\' );

function register_my_custom_menu_page(){
    add_menu_page(\'My Custom Page\', \'My Custom Page\', \'manage_options\', \'my-top-level-slug\', \'\', \'\', 28);
    add_submenu_page( \'my-top-level-slug\', \'My Custom Page\', \'My Custom Page\', \'manage_options\', \'my-top-level-slug\');
    add_submenu_page( \'my-top-level-slug\', \'My Custom Submenu Page\', \'My Custom Submenu Page\', \'manage_options\', \'my-secondary-slug\');
}