微信客服接口文本类型内容带超链接

$contenttext = "<a href='http://www.hao123.com/'>%s</a>";
        $data = array(
            "touser"=>"ok8ynxKCZOw8ajmED9nhNEpzEKfk",
            "msgtype"=>"text",
            "text"=>array(
                "content"=>$contenttext,
            )
        );

$data = json_encode($data);

$data = sprintf($data,"好123");

$access_token = $this->getAccessToken($this->appId,$this->appSecret);
$url = 'https://api.weixin.qq.com/cgi-bin/message/custom/send?access_token='.$access_token;
 $re = $this->httpPost($url,$data);

public function getAccessToken($appId,$appSecret) {
        if(empty($_SESSION['expires_in']) || $_SESSION['expires_in'] < time()){
            $url = "https://api.weixin.qq.com/cgi-bin/token?grant_type=client_credential&appid=$appId&secret=$appSecret";
            $res = json_decode($this->httpGet($url));
            $access_token = $res->access_token;
            if($access_token){
                $_SESSION['access_token '] = $access_token;
                $_SESSION['expires_in'] = $res->expires_in;
            }
        }else{
            $access_token = $_SESSION['access_token'];
        }
        return $access_token;
    }

private function httpPost($url,$data) {
        $ch = curl_init();
        curl_setopt($ch, CURLOPT_URL, $url);
        curl_setopt($ch, CURLOPT_POSTFIELDS,$data);
        curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
        curl_setopt($ch, CURLOPT_CONNECTTIMEOUT, 10);
        curl_setopt($ch, CURLOPT_TIMEOUT, 30);
        $result = curl_exec($ch);  
        curl_close($ch);
        return $result;
    }