Getting generic content into a list view LI

I have a couple special cases where I would really like to place my own divs with my own basic styles into a list item (so I can still get the collapsible support.) I can sort of do it, but the automatic list view handling places the extra elements to the right of my divs automatically (for the button and aside span), using up valuable real-estate.

Is there a way I can suppress the automatic list view magic, so-to-speak?