There’s currently no option to change the link from this menu. However, please try adding the following Javascript code to your theme files.
Please follow the steps below:
1. Go to BuddyBoss – Theme Options.
2. Under Custom Codes, enable JavaScript.
3. Append the following:
jQuery(document).ready(function() {
jQuery("#activity-following").addClass("selected");
jQuery("#activity-all").removeClass("selected");
jQuery("#activity-following .bb-component-nav-item-point").click();
});
4. Click Save Changes.