<?php
	if (!defined('_PS_VERSION_'))
	exit;

	class TopMenu extends Module {

       	public function __construct()
              {
                     $this->name = 'topmenu';
                     $this->tab = 'top menu';
                     $this->version = '0.3';
                     $this->author = 'PrestaShop';
                     $this->need_instance = 0;

                     parent::__construct();

                     $this->displayName = $this->l('Top Menu');
                     $this->description = $this->l('Adds a block to display an top menu.');

		}

            public function install(){
                    // let's create the hook (if it not exists)
                    $hook = new Hook();
                    $hook->name = 'top_menu';
                    $res = $hook->save();
                    // return true on install succeed
                    if ($res && parent::install())
                            return true;
                    return false;
            }
            public function uninstall()
            {
                    // uninstall the module will uninstall the hook :)
                    $hook = Hook::get('top_menu');
                    $res = $hook->delete();
                    // return true on uninstall succeed
                    if ($res && parent::uninstall())
                            return true;
                    return false;
            }
            public function hookTop_Menu(){
                    // of course, your theme contains {$TOP_MENU} somewhere !

                    // feel free to execute any code here
                    $a = 1;$b = 2; $c = $a + $b;

                    global $smarty;
                    // (you can use smarty)
                    $smarty->assign('res', $c);

                    // or also simple echos (not recommended of course)
                    echo "this will be displayed on pages containing {$TOP_MENU} (if I have good memories)";
            }
    }