public static function run()
 {
     $instance = self::get_instance();
     //start session
     QHShopSession::run();
     //start qhshop proudct
     QHShopProduct::run();
     //start shortcode
     QHShopShortCode::run();
     //start setting
     QHShopSetting::run();
     //run widget cart
     QHShopWidgetCart::run();
     //khoi dong order
     QHShopOrder::run();
     //run widget category
     QHShopWidgetCategory::run();
     return $instance;
 }