upd

application/library/Order/OrderConfirmUtil.php

@@ -728,7 +728,7 @@ class OrderConfirmUtil {
                     array('keyword5'=>array('value'=>$goods_str)),
                 ));
             $url = 'https://api.weixin.qq.com/cgi-bin/message/wxopen/template/send?access_token=';
-            $result = $this->sendurl($url, $access_token, $req_data, 'post');
+            $result = $this->sendurl($url, $access_token, json_encode($req_data), 'post');
         }
         $this->opCacheInfo();
         $this->pushMessage();