处理一个多维数组

$a=Array
(
    [0] => Array
        (
            [0] => Array
                (
                    [pname1] => 市场营销
                )            [1] => Array
                (
                    [pname] => 营销传播
                )            [2] => Array
                (
                    [pname] => 营销战略
                )        )    [1] => Array
        (
            [0] => Array
                (
                    [pname1] => 市场营销
                )            [1] => Array
                (
                    [pname] => 营销传播
                )        )
     [2] => Array
        (
            [0] => Array
                (
                    [pname1] => 品牌管理
                )            [1] => Array
                (
                    [pname] => 品牌战略
                )            [2] => Array
                (
                    [pname1] => 企业文化
                )            [3] => Array
                (
                    [pname] => 企业文化建设
                )        )）
处理成：
$a=array(array("pname1"=>"2","市场营销"=>array("营销传播","营销战略","营销传播")),array("pname1"=>"1","品牌管理"=>array("品牌战略","企业文化","企业文化建设")));
怎么处理呀
求大侠告知