在代码中调用存储过程

我使用最新的codeigniter，并尝试从我的模型调用存储过程。我也使用mysqli作为数据库驱动程序。现在我在调用两个存储过程时出现错误。以下是错误：

I am using latest codeigniter and trying to call stored procedure from my model. Also I am using mysqli as database driver. Now I am having an error when I call two stored procedures. Following is the error:

错误号码：2014

Error Number: 2014

命令不同步;您现在无法运行此命令

Commands out of sync; you can't run this command now

调用uspTest（）;

call uspTest();

文件名：E：\wamp \www\reonomy-dev\system\database\DB_driver.php

Filename: E:\wamp\www\reonomy-dev\system\database\DB_driver.php

行号：330

注意，当我调用单个存储过程，它工作正常。这里是模型的代码。

Note that when I call a single stored procedure it works fine. Here is the code for model.

class Menus_model extends CI_Model {

function __construct()
{
    parent::__construct();

}

public function getMenus()
{
    $query = $this->db->query("call uspGetMenus()");

    return $query->result();
}

public function getSubMenus()
{
    $query = $this->db->query("call uspTest()");
    return $query->result();
}

}

/ p>

Here is the code from controller

class MYHQ extends CI_Controller {

public function __construct()
{
    parent::__construct();
    $this->load->model('menus_model');
}

public function index()
{
    $menu = $this->menus_model->getMenus();
    $submenu = $this->menus_model->getSubMenus();
}

}

核心codeigniter ??

Is there any solution without hacking the core of codeigniter??