数组问题过滤器

Array(
[MainArray]=>Array
    (
 [myarray] => Array
        (
            [0] => Array
                (
                    [id] => 1234
                    [url] => google.com
                )

            [1] => Array
                (
                    [id] => 675677
                    [url] => stackoverflow.com
                )

            [2] => Array
                (
                    [id] => 234234
                    [url] => test.com
                )

        )
    )
 ) 

 foreach($MainArray[\'myarray\'] as $arr){
            $url = $arr[\'url\'];

}