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

another approach might be to stick all images physically into the same place BUT have a field on a form , say a drop down category [ "accessories", "mens", "ladies" in reference to the image.

in my db i store the names of the images literally as "kursaal2.jpg" etc . If i ALSO had a field giving a category to the images, then you can use that info in a query to pull the images that you want using a specific category.

CMS CI4     I use Arch Linux by the way