fix wrong if expression in link_tag
diff --git a/system/helpers/html_helper.php b/system/helpers/html_helper.php
index d8c3e6d..e8cef37 100644
--- a/system/helpers/html_helper.php
+++ b/system/helpers/html_helper.php
@@ -292,7 +292,7 @@
 		}
 		else
 		{
-			if ( ! preg_match('#^([a-z]+:)?//#i', $href))
+			if (preg_match('#^([a-z]+:)?//#i', $href))
 			{
 				$link .= 'href="'.$href.'" ';
 			}