// 自定义菜单
    public function menu(){
        // 实例化微信操作类
        $wx = new Wechat();
        
        $token = $wx->getAccessToken();
        
        $jsonmenu = '{ 
          "button":[ 
          { 
           "name":"天气预报", 
           "sub_button":[ 
           { 
            "type":"click", 
            "name":"北京天气", 
            "key":"天气北京"
           }, 
           { 
            "type":"click", 
            "name":"上海天气", 
            "key":"天气上海"
           }, 
           { 
            "type":"click", 
            "name":"广州天气", 
            "key":"天气广州"
           }, 
           { 
            "type":"click", 
            "name":"深圳天气", 
            "key":"天气深圳"
           }, 
           { 
            "type":"view", 
            "name":"本地天气", 
            "url":"http://m.hao123.com/a/tianqi"
           }] 
           
          
          }, 
          { 
           "name":"瑞雪", 
           "sub_button":[ 
           { 
            "type":"click", 
            "name":"公司简介", 
            "key":"company"
           }, 
           { 
            "type":"click", 
            "name":"趣味游戏", 
            "key":"游戏"
           }, 
           { 
            "type":"click", 
            "name":"讲个笑话", 
            "key":"笑话"
           }] 
          }] 
        }'; 
        
        $url = "https://api.weixin.qq.com/cgi-bin/menu/create?access_token=$token";
        // 生成自定义菜单
        $res = $wx->http_curl($url, 'post', 'json', $jsonmenu);
        echo "<pre>";
        print_r($res);
    }