Allow for more complex filtering.

I ran into this same issue. The quickest workaround is to remove

<a><code> from the list of tags to strip.

My issue was specifically that I didn't want to strip an empty anchor tag if it had an <code>id

attribute. I wonder if this is the only case worth supporting or if there are other tags and other attributes worth considering.

That is definitely something worth supporting indeed :)
Anyone up for creating a patch ?

I'll definitely keep an eye on this and might be able to throw up a patch if I get some free time at work. If someone else does the work on the new feature, I will happily make time to add test coverage.

I have to correct myself...

The quickest workaround is to remove from the list of tags to strip.

D'oh! The module offers a list of tags not to strip. So the current solution would be to add <a> to the list of tags not to strip.

As for the proposed solution: