[ci skip] Update codeigniter.com links to https
diff --git a/system/core/compat/mbstring.php b/system/core/compat/mbstring.php
index ff8e792..0c64ed3 100644
--- a/system/core/compat/mbstring.php
+++ b/system/core/compat/mbstring.php
@@ -31,7 +31,7 @@
* @copyright Copyright (c) 2008 - 2014, EllisLab, Inc. (http://ellislab.com/)
* @copyright Copyright (c) 2014 - 2016, British Columbia Institute of Technology (http://bcit.ca/)
* @license http://opensource.org/licenses/MIT MIT License
- * @link http://codeigniter.com
+ * @link https://codeigniter.com
* @since Version 3.0.0
* @filesource
*/
@@ -44,7 +44,7 @@
* @subpackage CodeIgniter
* @category Compatibility
* @author Andrey Andreev
- * @link http://codeigniter.com/user_guide/
+ * @link https://codeigniter.com/user_guide/
* @link http://php.net/mbstring
*/