Do you mean you would like to hide this invite friend filter http://take.ms/ZG7vG ?

If yes, you can apply this following custom css from your site backend > Easysocial > theme > custom css

body #es.es-frontend.view-friends .es-container .o-tabs__item[data-type="invites"] {

	display: none !important;

}

If you just want to hide that "invite friends" link, you have to download my attached file and replace into your current template override file location. JoomlaFolder/template/yourCurrentTemplate/html/com_easysocial/friends/default/invites.php

Do take note, you have to manually create those new folder.