WP Page Links – or – htaccess redirect

I have a secured checkout on my website. (https://at-riskyouth.org/products/checkout/) However the issue is that when Word Press links to other pages from an HTTPS web page that link will be to https://whatever. The guid of that page I’m linking to is http://whatever but that didn’t help.

So i need someway that i can change the way that Word Press does that linking. Or setup an htaccess redirect that will redirect all non-checkout pages to their non-secure web pages.

Any ideas?