PHP如何实现微信小程序中的分组菜单功能

{
    "menus": [
        {
            "name": "菜单1",
            "pagePath": "/pages/menu1/menu1"
        },
        {
            "name": "菜单2",
            "pagePath": "/pages/menu2/menu2"
        },
        {
            "name": "菜单3",
            "pagePath": "/pages/menu3/menu3"
        }
    ]
}

$menu_data = array();
//模拟从MySQL数据库中获取到的数据，可以根据实际情况进行修改
$menu_data['group'] = array(
    array(
        'name' => '分组1',
        'menus' => array(
            array(
                'name' => '菜单1',
                'path' => '/pages/menu1/menu1'
            ),
            array(
                'name' => '菜单2',
                'path' => '/pages/menu2/menu2'
            ),
            array(
                'name' => '菜单3',
                'path' => '/pages/menu3/menu3'
            )
        )
    ),
    array(
        'name' => '分组2',
        'menus' => array(
            array(
                'name' => '菜单4',
                'path' => '/pages/menu4/menu4'
            ),
            array(
                'name' => '菜单5',
                'path' => '/pages/menu5/menu5'
            )
        )
    )
);

$menus_array = array();
foreach($menu_data['group'] as $group){
    $menus = $group['menus'];
    foreach($menus as $menu){
        $menu_array = array(
            'name' => $menu['name'],
            'pagePath' => $menu['path']
        );
        array_push($menus_array, $menu_array);
    }
}
$json_data = array(
    'menus' => $menus_array
);
$json_string = json_encode($json_data);
echo $json_string;

$url = 'https://api.weixin.qq.com/cgi-bin/wxopen/template/list?access_token=' . $access_token;
$ch = curl_init();
curl_setopt($ch, CURLOPT_URL, $url);
curl_setopt($ch, CURLOPT_POST, false);
curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
$result = curl_exec($ch);
curl_close($ch);

echo $result;