Thread:Extension talk:TextExtracts/Including text in nutshell box/reply

This sounds like you want a custom way of defining extracts. That's not currently supported, so you might want to wander into the area of hacks. One of them might be to implement your nutshell template as  In a nutshell: blah blah blah... , essentially turning an outer span into a div - however I'm not sure if some browsers, particulary old ones, will freak out from this. Stopping to remove divs or tables is an extreme move for a WIkipedia-like wikis, but I'm not sure what your content structure is.