Smarty PHP section looping problem

Hi,

I'm implementing smarty and I am trying to loop through some arrays.

I have this piece of code in a template:

{foreach key=outer_number item=out from=$outer}
<b> {$out.id}</b> <br>
{section name=inner_number loop=$inner[$out.id]}
{$inner[$out.id][inner_number].name} <br>
{/section}
{/foreach}


which once the arrays are filled produces:

7618
7617
7616
7615

As you can see the code is looping through the outer array, displaying
the id but never gets into the inner array using $out.id.

For de-bugging purposes I have hard-coded $out.id with 7618 (one of
the displayed $out.id's) the code now looks like:

{foreach key=outer_number item=out from=$outer}
<b> {$out.id}</b> <br>
{section name=inner_number loop=$inner[7618]}
{$inner[7618][inner_number].name} <br>
{/section}
{/foreach}

which produces:

7618
Goodwin
Montgomerie
Cottey
Adams
Ambrose
Martin-Jenkins
Prior
Davis
Kirtley
Lewry
7617
Goodwin
Montgomerie
Cottey
Adams
Ambrose
Martin-Jenkins
etc
etc

The code is now looping through the outer array and the inner array.

Can anyone suggest how I can get the code to properly use $out.id
inside the inner loop?

Thanks