public function dropDown(array $links)
    {
        if (is_array($links[0])) {
            foreach ($links as $link) {
                call_user_func([$this, 'dropDown'], $link);
            }

            return $this;
        }

        $this->data['dropDown'][] = [
            'name' => $links[0],
            'href' => $links[1],
        ];

        return $this;
    }