Regrettably, there is a little boiler plate involved - first requirement is that in your ftl you reference this ftl at the top of your body:

<#include "/template/global/include/view-profile-header.ftl"/>

This is what gives you your tabs.

As a result, you will need several things available in your action:

    public User getTargetUser() {
        return targetUser;
    }

    public boolean isViewingSelf() {
        return getUser() != null && getUser().getID() == targetUser.getID();
    }

    public String getView() {
        return view;
    }

Where view is simply the name of the tab.

Hope that helps,

Alex