How to explode an array within Smarty?

[duckduckgoose]

Ok, so this question has been changed because I've made a lil' progress:

Now my array looks like this:

Array
(
    [0] => Array
        (
            [parent_id] => 2
            [parent_name] => Master Category 2
            [child_ids] => Array
                (
                    [0] => 16
                    [1] => 15
                    [2] => 14
                    [3] => 13
                    [4] => 12
                    [5] => 11
                    [6] => 10
                    [7] => 9
                )

        [child_name] => Array
            (
                [0] => Sub Category 2H
                [1] => Sub Category 2G
                [2] => Sub Category 2F
                [3] => Sub Category 2E
                [4] => Sub Category 2D
                [5] => Sub Category 2C
                [6] => Sub Category 2B
                [7] => Sub Category 2A
            )

    )

[1] => Array
    (
        [parent_id] => 3
        [parent_name] => Master Category 3
        [child_ids] => Array
            (
                [0] => 24
                [1] => 23
                [2] => 22
                [3] => 21
                [4] => 20
                [5] => 19
                [6] => 18
                [7] => 17
            )

        [child_name] => Array
            (
                [0] => Sub Category 3H
                [1] => Sub Category 3G
                [2] => Sub Category 3F
                [3] => Sub Category 3E
                [4] => Sub Category 3D
                [5] => Sub Category 3C
                [6] => Sub Category 3B
                [7] => Sub Category 3A
            )

    )
}

But, I'm having trouble accessing the values for the key in the 'child_name' array. I've tried using nested section loops and nested foreach loops, but I'm unsuccessful. Help?

[duckduckgoose]

Well, I was able to do the following and get the child_name values, but I want to also be able to get the child_id values.

		{foreach from=$category item=value name="cat"}
			{if $smarty.foreach.cat.index % 3 == 0}
				<div class="new-master-category">{$value.parent_name}
			{else}
				<div class="master-category">{$value.parent_name}
			{/if}

		{foreach from=$value.child_name key=key item=value2 name="sub"}
			{if $smarty.foreach.sub.index <=3}<div class="home-subcategory">{$value2}</div>{/if}
		{/foreach}
			</div>
	{/foreach}
	</div>

Any suggestions?