Menu bar

Centered Menu Basic Example

http://matthewjamestaylor.com/blog/beautiful-css-centered-menus-no-hacks-full-cross-browser-support#

CSS Centered Menu

http://matthewjamestaylor.com/centered-menus/#

Navigation Bar (w3school)

http://www.w3schools.com/css/css_navbar.asp

Centering a horizontal spry menu

http://foundationphp.com/tutorials/sprymenu/centering.php

Customize spry menu

http://foundationphp.com/tutorials/sprymenu/customize1.php