session from http to https

[eluser]joao.sobrinho[/eluser]
I'm having the same problem when the user is redirected from HTTPS to HTTP after login.

The session is lost in the production environment, because it is saved in the cookie. (saving it DB won't work... other problems came up in that approach)

Is there any configuration that can be made by default outsite of codeigniter that can make this behaviour to happen ?

In my case, it's the same domain, the HTTP and HTTPS pages.