Improvements to invoice display and other misc items

application/classes/URL.php

@@ -57,7 +57,7 @@ class URL extends Kohana_URL {
 	public static function navbar() {
 		$result = array();
 
-		foreach (array_reverse(static::$method_directory) as $k=>$v)
+		foreach (array_reverse(self::$method_directory) as $k=>$v)
 			switch ($k) {
 				case 'admin': $result[$k] = array('name'=>'Administrator','icon'=>'icon-globe');
 					break;