关于php数组的处理

现有：
$arr = array(
     Array('101-1148713','-68500','高岩'),
     Array('101-1148713','-1464.6','高岩'),
     Array('101-1148712','11','高岩'),
     Array('101-1148713','98500','高岩'),
     Array('101-1177035','-11068.4','全玮')
);
我怎么转化为
$arr = array(
    '高岩'=>array(
         '101-1148713'=>array('-68500','-1464.6','98500'),

         '101-1148712'=>array('11');
    ),

'全玮'=>array(
         '101-1177035'=>array('-11068.4')
    )
);

回复讨论(解决方案)

$arr = array(    	Array('101-1148713','-68500','高岩'),    	Array('101-1148713','-1464.6','高岩'),    	Array('101-1148712','11','高岩'),    	Array('101-1148713','98500','高岩'),    	Array('101-1177035','-11068.4','全玮'));foreach($arr as $v) {  $res[$v[2]][$v[0]][] = $v[1];}print_r($res);

Array(    [高岩] => Array        (            [101-1148713] => Array                (                    [0] => -68500                    [1] => -1464.6                    [2] => 98500                )            [101-1148712] => Array                (                    [0] => 11                )        )    [全玮] => Array        (            [101-1177035] => Array                (                    [0] => -11068.4                )        ))

谢谢斑竹