DEDE二級欄目title中替換_后去除兩邊空格的方法

原文是 $this->Fields['title'] = ereg_replace("[<>] "," / ",$this->TypeLink->GetPositionLink(false));

//修改官方"/" 為_

$this->Fields['title'] = ereg_replace(" [<>] ","_",$this->TypeLink->GetPositionLink(false));