Go to your database via phpmyadmin or you sql server via.
Find the wp-options ==> site-url field ==> edit ==> change your url path.
Then go to click next link.
There find the Home field ==> edit ==> change your url path.
then click go. Enjoy.
More useful related link is below :
http://www.tamba2.org.uk/wordpress/site-url/
http://codex.wordpress.org/Moving_WordPress
http://codex.wordpress.org/Changing_The_Site_URL