Creating a list or library we need to be very careful because what we put in the name field will be the link of the list or library and also be used as a title of the list or library. It is possible to change the link of list or library but we need to go through the SharePoint Designer 2010. In case you want to change the link of a list or library the steps are followings:
Open the site in SharePoint Designer 2010
From the site, go to site settings – navigation and just click on the Ok button. The link will be added to the links on the Quick Launch to the left.