<?php

$forums = Array (
    [0] => Array (
        [id] => 1
        [name] => Test Catagory
        [parent] => 0
        [order] => 1
        [forum] => Array (
            [0] => Array (
                [id] => 3
                [name] => Test Forum
                [parent] => 1
                [order] => 1
                [forum] => Array (
                    [0] => Array (
                        [id] => 6
                        [name] => Test Sub-Forum 2
                        [parent] => 3
                        [order] => 2
                    )
                )
            )
            [1] => Array (
                [id] => 4
                [name] => Test Forum 2
                [parent] => 1
                [order] => 2
            )
        )
    )
    [1] => Array (
        [id] => 2
        [name] => Test Catagory 2
        [parent] => 0
        [order] => 2
        [forum] => Array (
            [0] => Array (
                [id] => 7
                [name] => Test Forum 3
                [parent] => 2
                [order] => 1
            )
        )
    )
)

   $smarty->assign('forum', $forums);

?>