How to search and replace value in multidimensional array in php

we implement following code for search and replace a value in multidimensional array without loops like (while, for, for each) so this is very fast when compared to others.

<?php
 $data = array(
        'repeater-1' => array(
            array(
                'first_value' => 'value1',
                'second_value' => 'value2',
            ),

            array(
                'first_value' => 'value3',
                'second_value' => 'value4',
            ),
        ),

        'repeater-2' => array(
            array(
                'first_value' => 'value5',
                'second_value' => 'value6',
            ),

            array(
                'first_value' => 'value7',
                'second_value' => 'value8',
            ),
        ),
    );
$stu_bridge_json = str_replace_json('value1','my_value',$data);


//convert array to json and replace a string and create back to array
function str_replace_json($search, $replace, $subject){
     return json_decode(str_replace($search, $replace,  json_encode($subject)));
}

Output

stdClass Object
(
    [repeater-1] => Array
        (
            [0] => stdClass Object
                (
                    [first_value] => my_value
                    [second_value] => value2
                )

            [1] => stdClass Object
                (
                    [first_value] => value3
                    [second_value] => value4
                )

        )

    [repeater-2] => Array
        (
            [0] => stdClass Object
                (
                    [first_value] => value5
                    [second_value] => value6
                )

            [1] => stdClass Object
                (
                    [first_value] => value7
                    [second_value] => value8
                )

        )

)