使用参数\'show_in_menu\' 在函数中register_post_type() 将此CPT添加到菜单。也可以在现有或创建的菜单项中用作子菜单。现在，以一个示例将此作为子菜单添加到现有自定义帖子类型中。

// This custom post type will be added as a submenu to the \'Portfolio\' menu
$args = array(
  \'labels\' => array(
        \'all_items\'           => \'Locations\',
        \'menu_name\'           => \'Locations\',
        \'singular_name\'       => \'Location\',
        \'edit_item\'           => \'Edit Location\',
        \'new_item\'            => \'New Location\',
        \'view_item\'           => \'View Location\',
        \'items_archive\'       => \'Location Archive\',
        \'search_items\'        => \'Search Locations\',
        \'not_found\'           => \'No locations found.\',
        \'not_found_in_trash\'  => \'No locations found in trash.\'
    ),
    \'supports\'      =>  array( \'title\', \'editor\', \'revisions\' ),
    \'show_in_menu\'  =>  \'edit.php?post_type=portfolio\',
    \'public\'        =>  TRUE
);
register_post_type( \'location\', $args );