diff --git a/user_guide/general/controllers.html b/user_guide/general/controllers.html
index f11d092..c13f218 100644
--- a/user_guide/general/controllers.html
+++ b/user_guide/general/controllers.html
@@ -95,7 +95,7 @@
 
 
 <textarea class="textarea" style="width:100%" cols="50" rows="10">
-<?php
+&lt;?php
 class Blog extends Controller {
 
 	function index()
@@ -103,7 +103,7 @@
 		echo 'Hello World!';
 	}
 }
-?>
+?&gt;
 </textarea>
 
 
@@ -150,7 +150,7 @@
 
 
 <textarea class="textarea" style="width:100%" cols="50" rows="15">
-<?php
+&lt;?php
 class Blog extends Controller {
 
 	function index()
@@ -163,7 +163,7 @@
 		echo 'Look at this!';
 	}
 }
-?>
+?&gt;
 </textarea>
 
 <p>Now load the following URL to see the <dfn>comment</dfn> function:</p>