To ensure that they donot toggle between http and https, go to secure pages and let say you want to make a specific link 'mylink' secure. Write (use aesterik and forward slash before link and (forward slash and aesterik) after your link) in the list of secured pages to ensure that it is secured. I did it in multilingual site and it worked for me.

Posted this thing so that any one can take advantage of it. :)