Hi Kasper,
First you need to determine if the two column layout needs to implemented from a template level or if simply adding the column code within the item fulltext is only required.
If many items need to have a two column layout, I would advise implementing it from a template level. But if only a few items require such a layout, then I would advise simply adding it via the fulltext.
Sample Code: Bootstrap 2
<div class="row">
<div class="span6">...</div>
<div class="span6">...</div>
</div>
Sample Code: Bootstrap 3
<div class="row">
<div class="col-md-6">...</div>
<div class="col-md-6">...</div>
</div>
Note: you will need to change the column counts based on your existing template. So if body content area is 8 columns wide, you would use span4 or col-md-4.
I hope this helps,
Joe Campbell
