Multitab browsing with codeigniter

[eluser]Unknown[/eluser]
Hi

I have a problem with codeigniter session and multitab browsing. I set sessions with codeigniter session library. Everything is fine untill i open a new tab in the same browser. Unfortunately new session replaced with previous one and it makes sense. Because browser supports one session. How can i set sessions based on tabs? consider you have a products review site and you save product id in session. All results are shown based on this product id. But when you open two tabs, new tab's product id replaced with previous one. This is my problem.
Thanks in advance.