[Jiaz]

Let's try to check this step by step:
0.) your links show up as "instagram.com" in linkgrabber on right side/quickfilter in hoster section? they must not have prefix http_ !
1.) does the test button in your filter rule successfully apply/filter out a instagram test URL? The regex checkbox must not be enabled!
2.) The rule is added in Settings->Linkgrabber Filter->"Filter tab" and NOT "Views" tab ?
3.) Linkgrabber Filter is enabled? Settings->Linkgrabber Filter, checkbox in scrollbar or upper right corner
4.) You don't have any filter in Settings->Linkgrabber Filter->*Views* tab, that matches your instagram URLs ?