First, it might be best to start by rolling your own collapse elements. Read up on that in the documentation. Once you get the structure down, you can use the tag, trigclass and targclass attributes with the shortcode, if you want.
Next, create structure using two divs w/o any of the collapse-o-matic features. this will be done by creating your CSS and assigning the classes to both left and right divs.
Finally, apply the collapse-o-matic IDs and classes, so it should look something like this:
<div class='left collapseomatic noarrow' id='id8863' rel="animal-highlander">co-labs</div>
<div id='target-id8863' class='right collapseomatic_content '>co-labs content</div>
Best of luck!