Mobile Redirect to Mobile Landing Page

I just bought a great mobile landing page from someone on the WF. My problem is that my client has a huge website and we didn’t want to add all the pages to the mobile site…just the top ones.

I was hoping that I could have subcategory buttons that would go back to the regular site.

I added the redirect script to the header.php file which was where I thought it should go. My problem is that the category buttons now also redirect to the mobile landing page. Nothing can get me back to the main site.

Can anyone tell me how to set this up so that I can link back to the desktop version? I know on a regular site I would just add the script to the index page. I can’t figure out how to do that with wp.

All the plugins I’ve tried won’t allow me to use the landing page I want to use.

Thanks!
Cheryl