Fix regression

htdocs/categories/class/categorie.class.php

@@ -113,7 +113,7 @@ class Categorie extends CommonObject
 	 *
 	 * @todo Move to const array when PHP 5.6 will be our minimum target
 	 */
-	public static $MAP_CAT_FK = array(
+	public $MAP_CAT_FK = array(
 		'customer' => 'soc',
 		'supplier' => 'soc',
 		'contact'  => 'socpeople',
@@ -125,7 +125,7 @@ class Categorie extends CommonObject
 	 *
 	 * @note Move to const array when PHP 5.6 will be our minimum target
 	 */
-	public static $MAP_CAT_TABLE = array(
+	public $MAP_CAT_TABLE = array(
 		'customer' => 'societe',
 		'supplier' => 'fournisseur',
 		'bank_account'=> 'account',
@@ -136,7 +136,7 @@ class Categorie extends CommonObject
 	 *
 	 * @note Move to const array when PHP 5.6 will be our minimum target
 	 */
-	public static $MAP_OBJ_CLASS = array(
+	public $MAP_OBJ_CLASS = array(
 		'product'  => 'Product',
 		'customer' => 'Societe',
 		'supplier' => 'Fournisseur',