Fixed issue #2638 which prevented loading models in sub-folders by passing an array.
diff --git a/system/core/Loader.php b/system/core/Loader.php
index 1709c2d..a218e79 100644
--- a/system/core/Loader.php
+++ b/system/core/Loader.php
@@ -222,7 +222,7 @@
 		{
 			foreach ($model as $key => $value)
 			{
-				$this->model(is_int($key) ? $value : $key, $value);
+				is_int($key) ? $this->model($value, '', $db_conn) : $this->model($key, $value, $db_conn);
 			}
 			return;
 		}
@@ -1293,4 +1293,4 @@
 }
 
 /* End of file Loader.php */
-/* Location: ./system/core/Loader.php */
\ No newline at end of file
+/* Location: ./system/core/Loader.php */