How to prevent CKEditor changing source code?

Hi Guys,

I have drilled though the config settings but I can't see how to prevent CKEditor changeing:

<table>
  {foreach from=$PRODUCTS item=product} 
  <tr>
    <td>{$product.name}</td>
  </tr>
  {/foreach}
</table>

to:

{foreach from=$PRODUCTS item=product} {/foreach}
<table>
  <tr>
    <td>{$product.name}</td>
  </tr>
</table>