I've upvoted both of the other answers, because they're both helpful, but not exactly what I'm requesting. I want to display tabs inside a node, with content from the body field. I found that I can add in jQuery UI tabs by adding the appropriate js library and javascript to a particular node.
See: http://dansilvercentral.com/jquery-ui-tabs-drupal-7-tutorial for an example.
Also, to facilitate easier implementation of this on a node-by-node basis, I have a custom module to add an on-site admin interface to choose which pages should get the library added to them, and I'm using Code per Node to be able to simply add the JS right on the page in the node edit form. I'd rather not have to keep adding to a custom module to support content being added and maintained on the site.