Here's example of what I need: http://katalog.toolssweden.se/en/ When you add a plate number I.E. SAD544 it echos the car selected and I think it saves information in session (something similar like login logout) of what car is selected. But instead I need to select cars via dependable dropdown from mysql or json and when the car is selected I would like it to echo results exactly the same as in example. And no matter where in the website I go it stays the same, so that only parts for selected car are shown in the category. This would require at least 2 additional tables. 1 for reading car data, and another to map products to vehicles. I need this ASAP, so please send me a message or better your skype details if you can help me. Thanks.