String Content = "<div class=\"str_title\"><span><a href=\"/caifu\">更多>></a></span>财富故事</div><div class=\"str_title\"><span><a href=\"/aiqing\">更多>></a></span>爱情故事</div>";
Content = Regex.Replace(Content, "<a (.*?)>", "", RegexOptions.Compiled);//过滤a标签
Content = Regex.Replace(Content, "</a>", "");//替换a结束标签
Response.Write(Content);