Codeigniter + Infinity scroll help

Hey guys,
I was wondering, has anyone made a project with infinite scroll and filtering data with "GET" parameters in url? Do you know any good examples to begin with? 
Since every tut i found on internet was about infinite scroll and not with data filtering using query string parameters. 

Should i make two different controllers (sth like "index" and "entries") or can i achieve it with a single controller?

Note that i don't want to refresh the page on every dropdown change, i just want to refresh the "div" content.

I hope i made myself clear! If you need any further clarification feel free to ask!

Thanks!

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//Life motto
if (sad() == true) {
     sad().stop();
     develop();
}