added form_multiselect() to form helper to make it easier to create multiselect fields, and to make it a bit more semantically correct to boot
diff --git a/system/helpers/form_helper.php b/system/helpers/form_helper.php
index 0173340..4716e49 100644
--- a/system/helpers/form_helper.php
+++ b/system/helpers/form_helper.php
@@ -247,6 +247,31 @@
 // ------------------------------------------------------------------------
 
 /**
+ * Multi-select menu
+ *
+ * @access	public
+ * @param	string
+ * @param	array
+ * @param	mixed
+ * @param	string
+ * @return	type
+ */
+if (! function_exists('form_multiselect'))
+{
+	function form_multiselect($name = '', $options = array(), $selected = array(), $extra = '')
+	{
+		if ( ! strpos($extra, 'multiple'))
+		{
+			$extra .= ' multiple="multiple"';
+		}
+	
+		return form_dropdown($name, $options, $selected, $extra);
+	}
+}
+
+// --------------------------------------------------------------------
+
+/**
  * Drop-down Menu
  *
  * @access	public