Assuming the web content is all static, you could use something like GoodReader, which will display local HTML files just fine.
Another option I use is an app called HTML Runtime. It's a bit tricky to set up (I don't think the author's native language is English), but it's designed to display locally-stored HTML that you move over to the device as a zip file. It's only $0.99.
Two other options worth mentioning, if you simply need to show the webpages, but not nessarily the link/navigate between them:
- Save the pages in question as .webarchive files using Safari on your Mac/PC and move them over to the iPad -- many reader-type apps (e.g. GoodReader) known how to display these types of files. This way you won't have to worry about copying all the HTML,CSS,image files, etc -- it will all be rolled into the webarchive file.
- Many (if not most) of the popular 3rd party browsers such as iCab, Atomic, etc. also allow you to save pages for offline viewing later. The primary difference is that they are stored within the individual browser so you'll need to use that same app to view them.
Hope this helps.