Hi i am facing very irritating issue my webpage is getting called twice.First time with plain url like

"localhost/test.php"

and second time with following parameter

"localhost/test.php?grid_id=list1&_search=false&nd=1456936160227&rows=20&jqgrid_page=1&sidx=1&sord=asc"

Now i tried this in core PHP as well in CodeIgnitor but giving same problem.
In case of CodeIgnitor my Controller function gets called twice causing entire process to go again.
Please help me to avoid autocallbacks or some workaround for it