fixed code sample
diff --git a/user_guide/general/controllers.html b/user_guide/general/controllers.html
index 2020011..782fbfa 100644
--- a/user_guide/general/controllers.html
+++ b/user_guide/general/controllers.html
@@ -274,7 +274,7 @@
<code>if ($this->output->cache_expiration > 0)<br />
{<br />
- $this->output->write_cache($output);<br />
+ $this->output->_write_cache($output);<br />
}</code>
If you are using this feature the page execution timer and memory usage stats might not be perfectly accurate