backend/app/plugins/wiaas/includes/order/class-wiaas-order-project.php

@@ -62,16 +62,16 @@ class Wiaas_Order_Project {
 			return array();
 		}
 
-		$available_terms = array_filter($all_terms, function($term) {
-			return self::is_order_project_available($term->term_id);
-		});
+		foreach ($all_terms as $term) {
+			if (self::is_order_project_available($term->term_id)) {
+				$available_terms[] = array(
+					'id' => $term->term_id,
+					'name' => $term->name
+				);
+			}
+		}
 
-		return array_map(function($term) {
-			return array(
-				'id' => $term->term_id,
-				'name' => $term->name
-			);
-		}, $available_terms);
+		return $available_terms;
 	}
 
 	/**