Add Link to BP Menu (User or Group)

addlinktobpmenu.php

<?php
// Do not include the opening php tag if it is already included in your file.

//* http://buddydev.com/buddypress/add-extra-links-to-buddypress-user-profile-menu-buddypress-group-menu/

add_action( 'after_setup_theme', 'buddydev_register_menus' );
function buddydev_register_menus() {
    
    register_nav_menu( 'bp-profile-extra-links', __( 'Extra profile links' ) );
    register_nav_menu( 'bp-group-extra-links', __( 'Extra Group links' ) );
}

add_action( 'bp_member_options_nav', 'buddydev_add_profile_extra_links' );
function buddydev_add_profile_extra_links() {
    
    if ( has_nav_menu( 'bp-profile-extra-links' ) ) {
        wp_nav_menu( array( 'container' => false, 'theme_location' => 'bp-profile-extra-links', 'items_wrap' => '%3$s' ) );
    }
}

add_action( 'bp_group_options_nav', 'buddydev_add_group_extra_links'  );
function buddydev_add_group_extra_links() {
    
    if ( has_nav_menu( 'bp-group-extra-links' ) ) {
        wp_nav_menu( array( 'container' => false, 'theme_location' => 'bp-group-extra-links', 'items_wrap' => '%3$s' ) );
    }
}