你可以试试这个 - 不是最优雅的，但似乎有效:

You could try this - not the most elegant, but seems to work:

function convert(&$a)
{
  $result = Array();
  foreach($a as $k=>&$v)
  {
    $result[$v['id']]['name'] = $v['name'];
    if(is_array($v['content'])) $result[$v['id']]['content'] = convert($v['content']);
  }
  return $result;
}

if(count($array) != 0) $result = convert($array);