Stuff

<? 
$test = array( 
  array(1, 2, 3, array(1223, 343, 45433)), 
  array(1), 
  array('oi', 'ooo', 'unf', array('oi', 'ooo', 'unf'))
);


function prep(&$data) { 
  foreach($data as &$v) { 
    if(is_array($v)) 
	  $v = prep(&$v); 
	else 
	  $v = '123_' . $v;
  }
  return $data;
} 


prep(&$test); 

var_dump($test); 


?>