I have a navigation bar for my website:
Assuming you are using a scripting language such as PHP, you simply save that HTML above in a php file called header.php
(or something to your liking)
Then in your other php files you write:
include_once('header.php');
and it will plop that HTML right in there.
Some resources for you:
http://php.net/manual/en/function.include.php
http://www.php.net/manual/en/function.include-once.php
http://php.about.com/od/tutorials/ht/template_site.htm
Enjoy!