[pia]

I have this working in 4.3.1 with the following drop down code: (note... this is just a drop down not in a box as I have it in the header area)

<form name="form_manuf" method="get" action="manufacturers.php">
<select name="manufacturerid" onChange="document.form_manuf.submit()">
<option value="0" selected>Please Select Brand</option>
{section name=mid loop=$manufacturers_menu}
<option value="{$manufacturers_menu[mid].manufacturerid}">{$manufacturers_menu[mid].manufacturer|truncate:22:"...":true}</option>
{/section}
</select>
</form>

To have it in a menu box use:

{if $manufacturers_menu ne ''}
{capture name=menu}
<form name="form_manuf" method="get" action="manufacturers.php">
<select name="manufacturerid" onChange="document.form_manuf.submit()">
<option value="0" selected>Please Select Brand</option>
{section name=mid loop=$manufacturers_menu}
<option value="{$manufacturers_menu[mid].manufacturerid}">{$manufacturers_menu[mid].manufacturer|truncate:22:"...":true}</option>
{/section}
</select>
</form>
{/if}
{/capture}
{include file="menu.tpl" dingbats="dingbats_categorie.gif" menu_title=$lng.lbl_manufacturers menu_content=$smarty.capture.menu}