function taxonomy_get_level($vid, $level) {
  static $levels;
  
  if (!isset($levels[$vid][$level])) {
    $tree = taxonomy_get_tree($vid);
    foreach ($tree as $term) {
      if ($term->depth == $level - 1) {
        $levels[$vid][$level][$term->tid] = $term->name;
      }
    }
  }
  return $levels[$vid][$level];
}