Library for codeigniter 3.1.5

It is easy to add your own libraries and it should be under application/libraries.
For quick crud, you can use https://www.grocerycrud.com/ and it is CI ready. Read the doc
and try it, it is simple to use however if you try a large table with many rows (>10000)
then you may run into problem. I only use this approach for lesser row table and use datatable
(another table library for jquery). It works well and support large tables

Good luck