fixed link to quick reference PDF
diff --git a/user_guide/general/quick_reference.html b/user_guide/general/quick_reference.html
index 4a79b27..9d6c908 100644
--- a/user_guide/general/quick_reference.html
+++ b/user_guide/general/quick_reference.html
@@ -57,7 +57,7 @@
<h1>Quick Reference Chart</h1>
-<p>For a PDF version of this chart, <a href="http://codeigniter.com/downloads/ci_quick_ref.pdf">click here</a>.</p>
+<p>For a PDF version of this chart, <a href="http://codeigniter.com/download_files/ci_quick_ref.pdf">click here</a>.</p>
<p><img src="../images/ci_quick_ref.png" width="763" height="994" border="0" /></p>