// tag地图
public function tag() {

    $txt = 'https://www.xunruicms.com/tag/'.PHP_EOL;
    $data = $this->table_site('tag')->order_by('id desc')->getAll(50000);
    foreach ($data as $t) {
        $txt.= dr_url_prefix(\Phpcmf\Service::L('router')->tag_url($t['pcode'])).PHP_EOL;
    }

    return $txt;
}