Merge WordPress Blog db to php db for user registration

I want to merge two database for user registration. [login to view URL] this is wordpress blog and [login to view URL] this is the main site. I want this two merge into one so that people come to register here- [login to view URL] and they can post the new property at a time they can post thier article using wordpress blog. We already have member panel but only need to merge the database so that when people register new at the same time they can do the both. For more detail ask me in PMB