Drupal 7: Breadcrumbs in ul

gistfile1

if (!empty($breadcrumb)) {
      $crumbs = '<ul class="breadcrumb">';
      
      $lastItem  = count($breadcrumb) - 1;
      foreach($breadcrumb as $index=>$value) {
          if ($index == $lastItem) {
              $crumbs .= '<li class="breadcrumb-last">'.t($value).'</li>';
          }
          else {
              $crumbs .= '<li>'.t($value).'</li>';
          }          
      }
      $crumbs .= '</ul>';
    }
      return $crumbs;
  }