有相同数据的键值的数组组成一个新的数组……

现有以下数组，想把【[goods_name_parent]】这个字段相同的键值组合，形成一个新的数组，并计算相同键值的个数……原数组如下：
==========================================================Array
(
   [0] => Array
       (
           [parent_id] => 1
           [parent_name] => 家用小型真空包装机
           [parent_short_name] => 家用小型真空包装机
           [goods_id] => 2
           [cat_id] => 155
           [goods_name] => 真空机配件01
           [goods_name_parent] => 真空油
           [goods_name_num] => 1
           [iii] => 0
           [short_name] => 真空机配件01
           [fittings_price] => ￥0元
           [shop_price] => ￥0元
           [goods_thumb] => images/201310/thumb_img/2_thumb_G_1381919471316.jpg
           [goods_img] => images/201310/goods_img/2_G_1381919471342.jpg
           [url] => goods.php?id=2
       )   [1] => Array
       (
           [parent_id] => 1
           [parent_name] => 家用小型真空包装机
           [parent_short_name] => 家用小型真空包装机
           [goods_id] => 9
           [cat_id] => 2
           [goods_name] => 全自动真空包装机03
           [goods_name_parent] => 家用真空机
           [goods_name_num] => 1
           [iii] => 1
           [short_name] => 全自动真空包装机03
           [fittings_price] => ￥125元
           [shop_price] => ￥125元
           [goods_thumb] => images/201310/thumb_img/9_thumb_G_1382013044872.jpg
           [goods_img] => images/201310/goods_img/9_G_1382013044421.jpg
           [url] => goods.php?id=9
       )   [2] => Array
       (
           [parent_id] => 1
           [parent_name] => 家用小型真空包装机
           [parent_short_name] => 家用小型真空包装机
           [goods_id] => 10
           [cat_id] => 2
           [goods_name] => 全自动真空包装机01
           [goods_name_parent] => 家用真空机
           [goods_name_num] => 1
           [iii] => 2
           [short_name] => 全自动真空包装机01
           [fittings_price] => ￥0元
           [shop_price] => ￥0元
           [goods_thumb] => images/201310/thumb_img/10_thumb_G_1382013065867.jpg
           [goods_img] => images/201310/goods_img/10_G_1382013065121.jpg
           [url] => goods.php?id=10
       )   [3] => Array
       (
           [parent_id] => 1
           [parent_name] => 家用小型真空包装机
           [parent_short_name] => 家用小型真空包装机
           [goods_id] => 15
           [cat_id] => 140
           [goods_name] => 真空机配件02
           [goods_name_parent] => 真空袋
           [goods_name_num] => 1
           [iii] => 3
           [short_name] => 真空机配件02
           [fittings_price] => ￥0元
           [shop_price] => ￥0元
           [goods_thumb] => images/201310/thumb_img/15_thumb_G_1382154824948.jpg
           [goods_img] => images/201310/goods_img/15_G_1382154824112.jpg
           [url] => goods.php?id=15
       ))==========================================================想实现的效果如下：
​
==========================================================
ArrayNew
(
   [0] => Array
       (
           [parent_id] => 1
           [parent_name] => 家用小型真空包装机
           [parent_short_name] => 家用小型真空包装机
           [goods_id] => 2
           [cat_id] => 155
           [goods_name] => 真空机配件01
           [goods_name_parent] => 真空油
           [goods_name_num] => 1
           [iii] => 0
           [short_name] => 真空机配件01
           [fittings_price] => ￥0元
           [shop_price] => ￥0元
           [goods_thumb] => images/201310/thumb_img/2_thumb_G_1381919471316.jpg
           [goods_img] => images/201310/goods_img/2_G_1381919471342.jpg
           [url] => goods.php?id=2
       )   [1] => Array
       (
           [parent_id] => 1
           [parent_name] => 家用小型真空包装机
           [parent_short_name] => 家用小型真空包装机
           [goods_id] => 9
           [cat_id] => 2
           [goods_name] => 全自动真空包装机03
           [goods_name_parent] => 家用真空机
           [goods_name_num] => 1
           [iii] => 1
           [short_name] => 全自动真空包装机03
           [fittings_price] => ￥125元
           [shop_price] => ￥125元
           [goods_thumb] => images/201310/thumb_img/9_thumb_G_1382013044872.jpg
           [goods_img] => images/201310/goods_img/9_G_1382013044421.jpg
           [url] => goods.php?id=9
       )    [2] => Array
       (
           [parent_id] => 1
           [parent_name] => 家用小型真空包装机
           [parent_short_name] => 家用小型真空包装机
           [goods_id] => 15
           [cat_id] => 140
           [goods_name] => 真空机配件02
           [goods_name_parent] => 真空袋
           [goods_name_num] => 1
           [iii] => 3
           [short_name] => 真空机配件02
           [fittings_price] => ￥0元
           [shop_price] => ￥0元
           [goods_thumb] => images/201310/thumb_img/15_thumb_G_1382154824948.jpg
           [goods_img] => images/201310/goods_img/15_G_1382154824112.jpg
           [url] => goods.php?id=15
       ))==========================================================
希望有能力有朋友帮助一下，谢谢。