How can I have CodeIgniter load specific pages using SSL?

How can I have CodeIgniter load specific pages using SSL? I have an apache2/mode_ssl server. mod_ssl uses a different document root than non-secure pages. For example, https (port 443) would serve pages out of /var/www/ssl_html/ And http (port 80) serves pages out of /var/www/html/. How would I get CodeIgniter to play nice with this setup?