Fixed a variable typo
diff --git a/system/libraries/Session.php b/system/libraries/Session.php
index e3fe16b..ed5f9c3 100644
--- a/system/libraries/Session.php
+++ b/system/libraries/Session.php
@@ -711,7 +711,7 @@
 		{

 			foreach ($data as $key => $val)

 			{

-				$data[$key] = str_replace('{{slash}}', '\\', $str);

+				$data[$key] = str_replace('{{slash}}', '\\', $val);

 			}

 			

 			return $data;