To display Loop in Custom Field Suite.

loop.php

<?php
/*
    A loop field named "gallery" with sub-fields "slide_title" and "upload"
    Loop fields return an associative array containing *ALL* sub-fields and their values
    NOTE: Values of sub-loop fields are returned when using get() on the parent loop!
*/
$fields = CFS()->get( 'gallery' );
foreach ( $fields as $field ) {
    echo $field['slide_title'];
    echo $field['upload'];
}