Help in converting vanilla PHP to CI (AJAX + filter + infinity scroll)

I'm trying to convert this PHP tutorial to CI Product Ajax Search Filter With Infinite Scroll More Using PHP And Mysqli. But so far, no luck. I "think" my problem is the Javascript code, specially this part. 

Code:

$.get("autoload.php?group_no="+total_record+"&brand="+brand+"&material="+material+"&size="+size,

I don't know how to make this JS code CI friendly. I tried something like this, but it didn't work.

Code:

$.get(baseURL+'/index.php/home/filtered'+group_no="+total_record+"&brand="+brand+"&material="+material+"&size="+size)

I'm after a kind of AJAX search/checkboxes filter with infinite scroll, but I found none implemented in CI. So, I'm trying to convert this tutorial to CI. 

Any tips or suggestions on how to do this?

Regards,
Castle