r-a-y

function my_login_redirect($redirect_to,$redirect_to2,$user) {
    global $bp;

    $city = xprofile_get_field_data(26, $user->ID );

    if( !empty($city) )
        return 'YOUR WEBSITE URL';
    else
        return bp_core_get_user_domain($user->ID) . 'profile/edit/';
}
add_filter('login_redirect','my_login_redirect',100,3);