smarty i foreach Opcje

[kajtek2008]

Kod

Array
(
    [0] => Array
        (
            [id] => 1
            [tytul] => Biznes
            [status] => 2
            [meta_desc] =>
            [sub] => Array
                (
                    [0] => Array
                        (
                            [id] => 6
                            [id_kat] => 1
                            [tytul] => Praca
                            [status] => 2
                            [meta_desc] =>
                        )

                )

        )

    [1] => Array
        (
            [id] => 2
            [tytul] => Ekonomia
            [status] => 2
            [meta_desc] =>
        )

    [2] => Array
        (
            [id] => 3
            [tytul] => Internet i komputery
            [status] => 2
            [meta_desc] =>
            [sub] => Array
                (
                    [0] => Array
                        (
                            [id] => 1
                            [id_kat] => 3
                            [tytul] => Programy
                            [status] => 2
                            [meta_desc] =>
                        )

                    [1] => Array
                        (
                            [id] => 2
                            [id_kat] => 3
                            [tytul] => Grafika
                            [status] => 2
                            [meta_desc] =>
                        )

                )

        )

)

Mam problem z wyciągnięciem drzewka


Biznes:
-Praca
Ekonomia:
Internet i komputery:
-Programy
-Grafika


Próbowałem przez foreach w foreach ale dalej wyskakuje ze jest tablica

sub:array