Snowbird

    function trail($separator = ' - ') {
      $trail_string = '';

      for ($i=0, $n=sizeof($this->_trail); $i<$n; $i++) {
        if (isset($this->_trail[$i]['link']) && tep_not_null($this->_trail[$i]['link'])) {
          $trail_string .= '<div id="breadcrumbdiv" itemscope itemtype="http://data-vocabulary.org/Breadcrumb">';
          $trail_string .= '<a href="' . $this->_trail[$i]['link'] . '" class="headerNavigation" itemprop="url"><span itemprop="title">' . $this->_trail[$i]['title'] . '</span></a>';
        } else {
          $trail_string .= $this->_trail[$i]['title'];
        }

        if (($i+1) < $n) $trail_string .= $separator;
        $trail_string .= '</div>';
      }

      return $trail_string;
    }