--- /home/fsouto/Downloads/moodle/course/externallib.php	2011-12-06 09:21:32.000000000 +0000
+++ course/externallib.php	2011-12-27 11:48:43.305342469 +0000
@@ -253,6 +253,71 @@
         );
     }
 
+
+       /**
+       * Delete categories
+       * @param array $options
+       * @return array
+       */
+       public static function delete_categories($options) {
+               global $CFG, $DB;
+               require_once($CFG->dirroot . "/course/lib.php");
+
+               //validate parameter
+               $params = self::validate_parameters(self::delete_categories_parameters(),
+                                                       array('categories' => $options));
+
+               foreach ($params['categories'] as $category) {
+                       if (!$deletecat = $DB->get_record('course_categories', array('id'=>$category['id']))) {
+                               throw new moodle_exception(get_string('invalidcategoryid'), 'webservice', null);
+                       }
+                       $context = context_coursecat::instance($deletecat);
+                       require_capability('moodle/category:manage', $context);
+                       require_capability('moodle/category:manage', get_category_or_system_context($deletecat->parent));
+
+                       //if a new parent was specified, move the subcontents to the new parent
+                       if (!empty($category['newparent']))
+                               category_delete_move($deletecat, $category['newparent'], false);
+                       else
+                               category_delete_full($deletecat, false);
+                       $deletedcategories[] = array('id' => $category['id']);
+               }
+               return $deletedcategories;
+       }
+	
+	
+	/**
+	* Returns description of method parameters
+	* @return external_function_parameters
+	*/
+	public static function delete_categories_parameters() {
+		return new external_function_parameters(
+			array(
+			'categories' => new external_multiple_structure(
+				new external_single_structure(
+					array(
+						'id' => new external_value(PARAM_INT, 'category id to delete'),
+						'newparent' => new external_value(PARAM_INT, 'the parent category to move the contents to, if specified', VALUE_OPTIONAL)
+					)
+				)
+				)
+			)
+		);
+	}
+	
+	/**
+	* Returns description of method parameters
+	* @return external_function_parameters
+	*/
+	public static function delete_categories_returns() {
+		return new external_multiple_structure(
+			new external_single_structure(
+				array(
+					'id' => new external_value(PARAM_INT, 'category id'),
+					)
+				)
+			);
+	}
+	
     /**
      * Get courses
      * @param array $options