protected function renderMenu()
    {
        if ($this->route === null && Yii::$app->controller !== null) {
            $this->route = Yii::$app->controller->getRoute();
        }
        if ($this->params === null) {
            $this->params = $_GET;
        }
        $items = $this->normalizeItems($this->items, $hasActiveChild);
        $options = $this->options;
        $tag = ArrayHelper::remove($options, 'tag', 'ul');
        return Html::tag($tag, $this->renderItems($items), $options);
    }