将php对象DateTime转换为二维数组中的字符串

Hi I have array like as

 Array
  (
   [0] => Array
    (
        [id] => 167
        [title] => hhhhh
        [start] => DateTime Object
            (
                [date] => 2016-05-08 00:00:00.000000
                [timezone_type] => 3
                [timezone] => Europe/Berlin
            )

        [end] => DateTime Object
            (
                [date] => 2016-05-10 00:00:00.000000
                [timezone_type] => 3
                [timezone] => Europe/Berlin
            )

    )

I need output witouch dateTime Object and Timezone etc, only date. I think that my new array should be look like below.

Array
(
[0] => Array
    (
        [id] => 167
        [title] => hhhhh
        [start] => 2016-05-08 00:00:00.000000
        [end]=> 2016-06-08 00:00:00000



    )

How do it work ?

I think it can works fine:

$result = array();
foreach($fatherArray as $element)
{
    $result[] = array("id"    => $element["id"],
                      "title" => $element["title"],
                      "start" => $element["start"]->date,
                      "end" => $element["end"]->date,);
}
var_dump($result);

I hope it helps you.