Tia<br>Alex<br>Yanto<pre>Array
(
    [kelas_x] => Array
        (
            [0] => Santi
            [1] => Yanto
            [2] => Reza
        )

    [kelas_xi] => Array
        (
            [0] => Tia
            [1] => Siska
            [2] => Nova
        )

    [kelas_xii] => Array
        (
            [0] => Robert
            [1] => Rudi
            [2] => Alex
        )

)
</pre>