private function _getTemplateList()
    {
        $dirlist = CommonFunctions::gdc(PSI_APP_ROOT.'/templates/');
        sort($dirlist);
        foreach ($dirlist as $file) {
            $tpl_ext = substr($file, strlen($file) - 4);
            $tpl_name = substr($file, 0, strlen($file) - 4);
            if ($tpl_ext === ".css") {
                if (preg_match("/(\S+)_bootstrap$/", $tpl_name, $ar_buf)) {
                    array_push($this->_bootstrap_templates, $ar_buf[1]);
                } else {
                    array_push($this->_templates, $tpl_name);
                }
            }
        }
    }