public function getBlogUrl($blogId)
    {
        if (isset($this->blogUrl[$blogId])) {

            return $this->blogUrl[$blogId];

        } else {

            $url = appSetting('url', 'blog-' . $blogId);
            $url = $url ? $url : 'blog/';
            $url = site_url($url);

            $this->blogUrl[$blogId] = $url;

            return $this->blogUrl[$blogId];
        }
    }