I like to use the nested tag in these instances.
here is an instance of some code I wrote using the multibox.
<logic:iterate id="category" property="progDisplayItems" name="allMenuForm">
<li>
<nested:multibox name="allMenuForm" property="displayItemsChosen">
<nested:write name="category" property="id" />
</nested:multibox>
<bean:write name="category" property="description" filter="false"/>
</logic:iterate>