$trn = 'Ali 11 Veli';

list($a, $b, $c) = explode(' ',$trn);

echo $a.'<br>'.$b.'<br>'.$c;
veya


$trn = 'Ali 11 Veli';

$tren= explode(' ',$trn);

echo $tren[0].'<br>'.$tren[1].'<br>'.$tren[2];