Product Group In Invoice Item Description

[Eng_Designer]

Guyz, can some one help me with this case?

default in "invoicepdf" & "viewinvoice" is only showing "item" i need also to add -product group !

the problem with this code

 

invoicepdf

 

foreach ($invoiceitems AS $item) {

$tblhtml .= '

<tr bgcolor="#fff">

<td align="center">'.$item['amount'].'</td>

<td align="right">'.nl2br($item['description']).'<br /></td>

</tr>';

 

viewinvoice

 

{foreach from=$invoiceitems item=item}

<tr>

<td>{$item.description}{if $item.taxed eq "true"} *{/if}</td>

<td class="textcenter">{$item.amount}</td>

</tr>

{/foreach}

 

how can i add product group behind plans ?