No, there's no way to edit rules outside of Hazel on OS X. It doesn't seem like remote rule editing is that much in demand so no iOS app for that is slated. Of course, if a whole lot of people can present compelling use cases for it, I'd start considering it but it does seem like a niche thing at the moment.
Note that some people use Dropbox to trigger Hazel. They can have Hazel watch their Dropbox folder for changes made from their iOS device. You might want to consider that route instead.