Admin panel - few questions about directories, upload, search engine, bootstrap

Hi
Hi. I'm newbie in CodeIgniter and I'm creating my own CMS. I have already created working images upload but now I want to add some field in which I can choose destination folder (or create it if needed). I need it because I will upload photos of different events and I want all of events to be separated galleries.

My second problem is creating some search engine. I want to create some simply search engine. I want it to search whole website content and display searching results. Would be perfect if it might show similar phrases too.

Thank
betflik