when i use this code:

piklist('field',array(
    'type' => 'group',
    'template' => 'field',
    'fields' => array(
        array(
            'type' => 'text',
            'field' => 'slider_text',
            'label' => __('Title','ik'),
        ),
        array(
            'type' => 'file',
            'field' => 'slider_image',
            'label' => __('Add photo','ik')
        ),
    ),
    'label' => __('Slider','ik'),
    'add_more' => true
));

All the images from upload field are in one custom field. I have no way of knowing which photo belongs to which title:

["slider_text"]=>
  array(2) {
    [0]=>
    string(7) "Slide 1"
    [1]=>
    string(7) "Slide 2"
  }
  ["slider_image"]=>
  array(5) {
    [0]=>
    string(3) "110"
    [1]=>
    string(2) "98"
    [2]=>
    string(2) "86"
    [3]=>
    string(2) "96"
    [4]=>
    string(2) "99"
  }

I know i can serialize the group but it doesn’t work properly in my case.