function widget($args, $instance)
 {
     global $wpdb;
     extract($args);
     extract($instance);
     $title = empty($instance['title']) ? ' ' : apply_filters('widget_title', $instance['title']);
     echo $before_widget;
     if (!empty($title)) {
         echo $before_title . $title . $after_title;
     }
     display_cu3er($instance['cu3er']);
     // content of our widget //
     echo $after_widget;
 }
function CU3ER_func($atts)
{
    global $wpdb;
    extract(shortcode_atts(array('slider' => false), $atts));
    if ($slider) {
        return display_cu3er($slider, true);
    } else {
        return false;
    }
}