Lightbox Galerie wird vom Slider ersetzt

<?php
add_filter('post_gallery', 'voltata_post_gallery', 10, 2);
function voltata_post_gallery($output, $attr) {
 global $post;
 if (isset($attr['orderby'])) {
   $attr['orderby'] = sanitize_sql_orderby($attr['orderby']);
   if (!$attr['orderby'])
     unset($attr['orderby']);
 }
 extract(shortcode_atts(array(
   'order' => 'ASC',
   'orderby' => 'menu_order ID',
   'id' => $post->ID,
   'itemtag' => 'dl',
   'icontag' => 'dt',
   'captiontag' => 'dd',
   'columns' => 3,
   'size' => 'thumbnail',
   'include' => '',
   'exclude' => ''
 ), $attr));
 $id = intval($id);
 if ('RAND' == $order) $orderby = 'none';
 if (!empty($include)) {
   $include = preg_replace('/[^0-9,]+/', '', $include);
   $_attachments = get_posts(array('include' => $include, 'post_status' => 'inherit', 'post_type' => 'attachment', 'post_mime_type' => 'image', 'order' => $order, 'orderby' => $orderby));
   $attachments = array();
   foreach ($_attachments as $key => $val) {
     $attachments[$val->ID] = $_attachments[$key];
   }
 }
  if (empty($attachments)) return '';
 
 $output  = '<div id="carousel-example-generic" class="carousel slide" data-ride="carousel">';
 $output .= '<ol class="carousel-indicators">';
  for($i = 0; $i < count($attachments ); $i++){
   if($i == 1){
    $active = ' class="active"';
   }else{
    $active = '';
   }
   $output .= '<li data-target="#carousel-example-generic" data-slide-to="' . $i . '"' . $active . '></li>';
  }
 $output .= '</ol>';
 $output .= '<div class="carousel-inner" role="listbox">';
 // Now you loop through each attachment
 $item = 0;
 foreach ($attachments as $id => $attachment) {
  if($item == 0){
   $active = " active";
  }else{
   $active = "";
  }
  $item++;
   // Fetch all data related to attachment
   $img = wp_prepare_attachment_for_js($id);
   $caption = $attachment->post_excerpt;
   $url = wp_get_attachment_image_src($id, 'full');
   $output .= "<div class='item" . $active . "'>";
   $output .= "<img src=" . $url[0] . " />";
   $output .= '<div class="carousel-caption">' . $caption . '</div>';
   $output .= "</div>";
 }
 $output .= "</div>";
 $output .= '
  <a class="left carousel-control" href="#carousel-example-generic" role="button" data-slide="prev">
   <span class="glyphicon glyphicon-chevron-left" aria-hidden="true"></span>
   <span class="sr-only">' . __('Previous', 'voltata') . '</span>
  </a>
  <a class="right carousel-control" href="#carousel-example-generic" role="button" data-slide="next">
   <span class="glyphicon glyphicon-chevron-right" aria-hidden="true"></span>
   <span class="sr-only">' . __('Next', 'voltata') . '</span>
  </a>
 ';
 $output .= "</div>";
 return $output;
}