$data = array(
array('status'=>1,'link'=>'grp_123','oid'=>121),
array('status'=>1,'link'=>'grp_123','oid'=>122),
array('status'=>1,'link'=>'grp_123','oid'=>123),

array('status'=>0,'link'=>'grp_124','oid'=>131),
array('status'=>0,'link'=>'grp_124','oid'=>132),
array('status'=>0,'link'=>'grp_124','oid'=>133),

array('status'=>1,'link'=>'grp_125','oid'=>141),
array('status'=>1,'link'=>'grp_125','oid'=>142),
array('status'=>0,'link'=>'grp_125','oid'=>143),

array('status'=>1,'link'=>'grp_126','oid'=>151),
array('status'=>0,'link'=>'grp_126','oid'=>152),
array('status'=>1,'link'=>'grp_126','oid'=>153),

array('status'=>0,'link'=>'grp_127','oid'=>161),
array('status'=>1,'link'=>'grp_127','oid'=>162),
array('status'=>1,'link'=>'grp_127','oid'=>163),

);

Array
(
[0] => Array
    (
     [status] => 1
     [link] => grp_123
     [oid] => 121
     [grp] => Array
     (
      [0] => Array
      (
        [status] => 1
        [link] => grp_123
        [oid] =>121
       )
      [1] => Array
      (
        [status] => 1
        [link] => grp_123
        [oid] =>122
       )
       [2] => Array
      (
        [status] => 1
        [link] => grp_123
        [oid] =>123
       )
     )
  )
 [1] => Array
      (
        [status] => 1
        [link] => grp_124
        [oid] =>131
       )
  [2] => Array
      (
        [status] => 1
        [link] => grp_125
        [oid] =>141
        [grp] =>Array
       (
      [0] => Array
      (
        [status] => 1
        [link] => grp_125
        [oid] =>141
       )
      [1] => Array
      (
        [status] => 1
        [link] => grp_125
        [oid] =>141
       )
     )
    )
  [3] => Array
      (
        [status] => 1
        [link] => grp_126
        [oid] =>151
        [grp] =>Array
       (
      [0] => Array
      (
        [status] => 1
        [link] => grp_126
        [oid] =>151
       )
      [1] => Array
      (
        [status] => 1
        [link] => grp_126
        [oid] =>153
       )
     )
    )
  [4] => Array
      (
        [status] => 1
        [link] => grp_127
        [oid] =>162
        [grp] =>Array
       (
      [0] => Array
      (
        [status] => 1
        [link] => grp_127
        [oid] =>162
       )
      [1] => Array
      (
        [status] => 1
        [link] => grp_127
        [oid] =>163
       )
     )
    )
)