织梦dedecms采集时不能采集生成tag跟描述的解决办法

else if($itemName == 'litpic')
           {
                $litpic = trim($ctag->GetInnerText());
            }

else if($itemName == 'keywords')
            {
                $keywords = trim($ctag->GetInnerText());
            }
            else if($itemName == 'body')
            {
                $body = trim($ctag->GetInnerText());
                $description = cn_substr(html2text($body),150);
                $description = str_replace('　','',$description);
                $description = addslashes($description);
            }

$mainSql = str_replace('@sortrank@', $sortrank, $mainSql);

$mainSql = str_replace('@description@', $description, $mainSql);

$rs = $dsql->ExecuteNoneQuery($mainSql);

$tags = InsertTags($keywords, $aid);