Custom tags in html table

Hi,
I am building an application where users can design site pages. I am providing a bunch of velocity tags for user to put in to provide dynamic content.

However I have issues with the fckeditor being too strict and stripping off code. For e.g. I have a for loop which I would like to show in a table
<table>
#foreach ($item in ${MyItem.items})
<tr>
<td>
${item.name}
</td>
</tr>
#end
</table>

When I toggle between source and editor view, it removes the foreach and the end tags because its out of place and replaces with

<table>
<tbody>
<tr>
<td>${item.name} </td>
</tr>
</tbody>
</table>

What can I do to solve this? I dont want to use ProtectedSource since then its not visible in editor mode. What are my options? This is critical for my app.. Someone please advise...