求将一个二维数组变成一维数组的高效算法

我想将一个二维数组中的所有第二维数据提出，重组成一个一维数组，但是不想用二层循环取
最多能接受的是一个一维数组
求算法
我用的是php语言，各位C大牛凑合着看
example
PHP code

$website = array();
$website['a'][0]['name'] = 'a';
$website['a'][0]['age'] = 10;
$website['a'][1]['name'] = 'a';
$website['a'][1]['age'] = 10;
$website['a'][2]['name'] = 'a';
$website['a'][2]['age'] = 10;
$website['b'][0]['name'] = 'b';
$website['b'][0]['age'] = 10;
$website['b'][1]['name'] = 'b';
$website['b'][1]['age'] = 10;
$website['b'][2]['name'] = 'b';
$website['b'][2]['age'] = 10;

想要变成的样子
PHP code

$website = array();
$website[0]['name'] = 'a';
$website[0]['age'] = 10;
$website[1]['name'] = 'a';
$website[1]['age'] = 10;
$website[2]['name'] = 'a';
$website[2]['age'] = 10;
$website[3]['name'] = 'b';
$website[3]['age'] = 10;
$website[4]['name'] = 'b';
$website[4]['age'] = 10;
$website[5]['name'] = 'b';
$website[5]['age'] = 10;

上面写错了一句话
我最多能接受的是一层循环

很好~顶顶顶顶顶顶~