Hello to all, can you please help me .How can i turn this code , to make an ajax request? Thanks

if (check_entity_relationship($user->getGUID(), "friendrequest", $entity->getGUID())) {
            // pending request
            $returnvalue[] = ElggMenuItem::factory(array(
                "name" => "friend_request",
                "text" => elgg_echo("friend_request:friend:add:pending"),
                "href" => "friend_request/" . $user->username . "#friend_request_sent_listing",
                "priority" => 500
            ));