system/config/pagination.php
directory
Views folder in which your pagination style templates reside.
Default value: 'pagination';
style
Style name (matches template filename).
Default value: 'classic';
uri_segment
URI segment (or 'label') in which the current page number can be found.
Default value: 3;
items_per_page
Number of items in a page of results.
Default value: 20;