IP Leaking on Reverse Proxy

Sorry if this is covered somewhere else but for the life of me can't find the answer.. I am running Nginx 1.4.7 as a reverse proxy on Ubuntu 13.04 to an Apache server. I have the / directory reverse proxied, but if I go to x.x.x.x/wordpress for example, the actual IP of the proxied site shows instead of the proxy site IP. Can someone point me in the right direction to include EVERY subdirectory of the site? Is this possible or do I need to add a location setup for every directory on the site I want proxied? Total noob with Nginx..

Thanks in advance.