If you want to display all the elements in one row just use this :
<tr>
{foreach from=$formData key='formEl' item='value'}
<td>{$formEl}</td>
{/foreach}
</tr>
If you want to display each set of elements in one row namely 6 by row use this :
<tr>
{foreach name='myLoop' from=$formData key='formEl' item='value'}
{if $smarty.foreach.myLoop.index % 6 == 0 && $smarty.foreach.myLoop.index != 0}
</tr><tr>
{/if}
<td> {$smarty.foreach.myLoop.iteration}</td>
{/foreach}
</tr>