jQuery(document).ready(function(){
    if ($('.set_custom_images').length > 0) {
    if ( typeof wp !== 'undefined' && wp.media && wp.media.editor) {
        $('.wrap').on('click', '.set_custom_images', function(e) {
            e.preventDefault();
            var button = $(this);
            var id = button.prev();
            wp.media.editor.send.attachment = function(props, attachment) {
                id.val(attachment.id);
            };
            wp.media.editor.open(button);
            return false;
        });
    }
};
});