$a=array(

　　      array(a,b,c),

　　array(c,d,e),

);

foreach($a as $k=>$v){

foreach($v as $value){

if(!in_array($value,$ids))

$ids[] = $value;

}

}

foreach($a as $k=>$v){

foreach($v as $value){

foreach($ids as $key=>$id){

if($id == $value){

$res[$key]['id'] = $id;

$res[$key]['num']++;

}

}

}

}

dump($ids);

dump($res);