Ultimate Member - Change the name of the 'Friends' tab to something else

friends.php

/**
 * Ultimate Member - Friends Extension
 */

function custom_um_friends_add_tabs( $tabs ) {
    $user_id = um_user( 'ID' );
    if ( ! $user_id ) {
        return $tabs;
    }

    $enabled_tab = UM()->options()->get( 'profile_tab_friends' );

    if ( ! empty( $enabled_tab ) || is_admin() ) {
        $tabs['friends'] = array(
			'name' => __( 'Tutors', 'um-friends' ),
			'icon' => 'um-faicon-users',
			'_builtin' => true,
        );
    }

    return $tabs;
}

add_filter( 'um_profile_tabs', 'custom_um_friends_add_tabs', 2000 );