protected function implodeWrapperClass()
    {
        if (is_array($this->data['widgetWrapperClass'])) {
            $this->data['widgetWrapperClass'] = implode(' ', $this->data['widgetWrapperClass']);
        }


        $re = '/class="(.*)"/';
        $str = $this->data['args']['before_widget'];
        preg_match_all($re, $str, $matches, PREG_SET_ORDER, 0);

        if (isset($matches[0][1])) {
            $widgetClass = 'c-navbar__widget widget widget_' . $this->config['id'] . ' ' . $this->data['widgetWrapperClass'];
            $oldClasses = $matches[0][1];
            $this->data['args']['before_widget'] = str_replace($oldClasses, $widgetClass, $this->data['args']['before_widget']);
        }
    }