[membrilius]

могу дать пример.

function fcompare($a, $b)
{
  return strcasecmp($a['pr'], $b['pr']);
}

$arr = array(
  1 => array ( 'name' => 'mas5', 'pr' => 'feerer dsf '),
  2 => array ( 'name' => 'mas4', 'pr' => 'arerdfgdfg df'),
  3 => array ( 'name' => 'mas6', 'pr' => 'tytfgdfgdfg sdf'),
  4 => array ( 'name' => 'mas7', 'pr' => 'zufdgdfasf sdf'),
  5 => array ( 'name' => 'mas8', 'pr' => 'wifgsgfhhk sdf'),
  6 => array ( 'name' => 'mas2', 'pr' => 'bofdretfdg sdf'),
  7 => array ( 'name' => 'mas9', 'pr' => 'ckxcfxcbdyfd sdf')
);

usort($arr, 'fcompare');

foreach($arr as $r => $v)
{
	echo $v['pr']."<br />";
}

по аналогия сделайте себе