Hiding the lists and libraries in quick launch menu?

When you create a new list or library, a link to that item is automatically added to the Quick Launch by default. You can change the Navigation option when you are creating a new list or library so that the item does not appear on the Quick Launch. You can also edit the option later by following these steps:

1. On the Quick Launch, click View All Site Content. Then click on the name of the list of library that you would like to edit.
   
   
   
   
2. On the Settings menu, click List Settings. Or, click the settings for the type of library that you are opening (i.e. Document Library Settings).
   
   
   
   
3. In the General Settings column, click Title, description and navigation.
   
   
   
   
4. In the Navigation section, you can remove the item from the Quick Launch by selecting No or you can add the item to the Quick Launch by selecting Yes.
   
   
   
   
5. Click Save. To return to your site, click on the name of the site.