树状结构

function array2tree($data, $pId)

{

    $tree = array();

    foreach($data as $k => $v) {

      if ($v['father_id'] == $pId) { 

           $v['child'] = array2tree($data, $v['organization_id']);

           $tree[] = $v;

      }

    }

    return $tree;

}