Accidently deleted top menu in Joomla! 1.5 and need to re-add it
What happens if you have accidently deleted the Top Menu or Any other Menu for your site and need to have it restored.
In the Joomla! Administrator (www.yoursite.com/administrator), select Extensions->Module Manager now the Module Manager appears.
Click on the NEW button to create a new Module for your site that you need to have in our case we are going to select the Menu Module called Menu and click on Next and then give it a name (Joomla! will ID this menu with the name)(Don’t use any spaces in this name and make sure that it is a unique name.) and set the parameters as you want it to appear. Important is that you specify the Menu Class Suffix to “-icon” (Under Parameters)(Remember that this may differ from template to template) for the top menu and that you select the correct Module Position for the Top Menu eg. top. otherwise the top menu won’t display correctly and then click on SAVEand publish the new menu in the Module Manager and it should now appear.