A user on the Islandora Google Group asked a question about how to output the MODS datastream of an object in HTML format. We do this on an Islandora site - http://www.IslandImagined.ca. There are many different approaches including the styling of Solr results.
The other is to create a disseminator and you can review these two FOXML objects - a service deployment object and a service definition object - to get started. One spot you'll want to change is the RELS-EXT of the service deployment object (islandora:mods2htmlSdep) and associate it with the appropriate content models that you have.
To change the display of your HTML you would update the XSL datastream of the islandora:mods2htmlSdep object.
Digital Initiatives and Systems Librarian
University of Prince Edward Island