fixed Writing Documentation nav link
diff --git a/user_guide/nav/nav.js b/user_guide/nav/nav.js
index 08ef21f..d8c65bf 100644
--- a/user_guide/nav/nav.js
+++ b/user_guide/nav/nav.js
@@ -122,7 +122,7 @@
'<li><a href="'+base+'general/quick_reference.html">Quick Reference Chart</a></li>' +
'<li><a href="http://codeigniter.com/forums/">Community Forums</a></li>' +
'<li><a href="http://codeigniter.com/wiki/">Community Wiki</a></li>' +
- '<li><a href="doc_style/index.html">Writing Documentation</a></li>' +
+ '<li><a href="'+base+'doc_style/index.html">Writing Documentation</a></li>' +
'</ul>' +
'</td></tr></table>');