--- tac_lite.module	2009-05-21 23:10:28.000000000 +0400
+++ tac_lite.new.module	2009-05-21 23:09:55.000000000 +0400
@@ -117,6 +117,14 @@ function tac_lite_admin_settings() {
       '#required' => TRUE,
     );
     
+    //checkbox, hide access terms if checked
+    $form['tac_lite_hide_terms'] = array(
+      '#type' => 'checkbox',
+      '#title' => t('Hide Access Terms'),
+      '#description' => t('Check this box if you want to stop vocabulary terms you use for access control from showing when nodes are viewed.'),
+      '#default_value' => variable_get('tac_lite_hide_terms', 0),
+    );
+    
     $ret = system_settings_form($form);
     // Special handling is required when this form is submitted.
     $ret['#submit'][] = '_tac_lite_admin_settings_submit';
@@ -499,3 +507,41 @@ function tac_lite_db_rewrite_sql($query,
     }
   }
 }
+
+
+/**
+ * Implementation of hook_nodeapi
+ * Unset access terms if needed
+ */
+function tac_lite_nodeapi(&$node, $op, $a3 = NULL, $a4 = NULL) {
+	switch ($op) {
+		case 'view' :
+			//check if we need to hide terms
+			$hide_terms = variable_get('tac_lite_hide_terms',0);
+			if ($hide_terms) {
+				_tac_lite_hide_access_terms($node);
+			}
+			break;
+	}
+}
+
+
+/**
+ * Hide access terms in node object before view. 
+ * Node reference is given by hook_nodeapi.
+ */
+function _tac_lite_hide_access_terms(&$node) {
+	//get access vocabularies
+	$vids = variable_get('tac_lite_categories', array());
+	if (count($vids) == 0) {
+		return ;
+	}
+	//unset terms for access vocabularies
+	foreach ($vids as $vid) { 
+		$terms = taxonomy_node_get_terms_by_vocabulary($node,$vid);
+		foreach ($terms as $term) {
+			unset($node->taxonomy[$term->tid]);
+		}
+	}
+} //function _tac_lite_hide_access_terms
+