I've tried quote a few things to get what seems like a super simple problem to work, but it always ends up duplicating my regexes and causing a redirection loop.
This is what I need to do:
http://www.mywebsite.com/blog/tag/(the same text from above)
I can sort of get it to work, but it usually causes the redirection to be /blog/blog/blog/blog/....../tag/seo//////////////
Or, some variation of that repetition.
I've update the permalink settings to have the /blog/ directory in the URL before all blog pages. This applies to tags. However, for some reason, webmaster tools has indexed the /tag/ without the /blog/ causing quite a few broken URLs. I guess I could force remove them, but I'd rather do it this way as there are other links.
If this is not possible with regex, or there is a better solution, I would appreciate it!