Find Previous/next profile group Id

<?php

/*custom functions to get next/prev group id*/
//find next group id, return false if current group is last
function custom_get_next_group_id(){
//global $group;
$current_group_id=bp_get_current_profile_group_id();
//get all the groups
$groups = BP_XProfile_Group::get( array( 'fetch_fields' => false ) );
$group_id=false;
foreach($groups as $group){
    if($group->id>$current_group_id){
          $group_id= $group->id;//this is immediate next group
          break;
    }
}
return $group_id;

}
//find prev group, 0 if this is first group
function custom_get_prev_group_id(){
//global $group;
$current_group_id=bp_get_current_profile_group_id();
//get all the groups
$groups = BP_XProfile_Group::get( array( 'fetch_fields' => false ) );
//sniff prev group_id
$group_id=0;//which is non existent
foreach($groups as $group){

    if($group->id<$current_group_id){
          $group_id= $group->id;//immediate next group is
          continue;
    }
}
return $group_id;
}

//get the edit link for a group
function custom_get_group_edit_link($group_id){
    global $bp;
    return $bp->displayed_user->domain . $bp->profile->slug . '/edit/group/' . $group_id;

    }


?>