Visual Composer Param group

<?php if ( ! defined( 'ABSPATH' ) ) { die; } // Cannot access pages directly.

vc_map(array(
  'name' => 'Client Logos',
  'base' => 'maxima_accordion',
  'category' => 'Amq',
  'params' => array(
    array(
      'type' => 'textfield',
      'name' => __('Title', 'amqtheme'),
      'holder' => 'div',
      'heading' => __('Title', 'amqtheme'),
      'param_name' => 'title',
    ),
    array(
        'type' => 'param_group',
        'param_name' => 'values',
        'params' => array(
            array(
                'type' => 'attach_image',
                'name' => 'label',
                'heading' => __('Image', 'amqtheme'),
                'param_name' => 'label',
            ),
            array(
                'type' => 'textfield',
                'name' => 'Content',
                'admin_label' => true,
                'heading' => __('Link', 'amqtheme'),
                'param_name' => 'excerpt',
            )
      )

    ),
  ),

));


function maxima_accordion_shortcode($atts){
  extract(shortcode_atts(array(
    'values' => '',
  ), $atts));

  $list = '';


  $values = vc_param_group_parse_atts($atts['values']);

  $param_group_items = array();

  foreach($values as $data){
    $new_line = $data;
    $new_line['label'] = isset($new_line['label']) ? $new_line['label'] : '';
    $new_line['excerpt'] = isset($new_line['excerpt']) ? $new_line['excerpt'] : '';

    $param_group_items[] = $new_line;

  }



    $list .='<div class="partners-list">';
    $list .='<ul class="partners-logo list-inline text-center">';

        foreach($param_group_items as $single_item):

        $logo_array = wp_get_attachment_image_src($single_item['label'], 'large', false);

            $list .='<li><a href="'.$single_item['excerpt'].'"><img src="'.$logo_array[0].'" alt=""/></a></li>';

        endforeach;

    $list .='</ul>';
    $list .='</div>';

    return $list;
    wp_reset_query();

}
add_shortcode('maxima_accordion', 'maxima_accordion_shortcode');