Index: trunk/kernel/units/categories/categories_tag_processor.php
===================================================================
diff -u -r3723 -r4243
--- trunk/kernel/units/categories/categories_tag_processor.php	(.../categories_tag_processor.php)	(revision 3723)
+++ trunk/kernel/units/categories/categories_tag_processor.php	(.../categories_tag_processor.php)	(revision 4243)
@@ -142,7 +142,11 @@
 			$sql = 'SELECT CategoryId, ParentId, Name FROM '.$this->Application->getUnitOption($this->Prefix, 'TableName').'
 					WHERE CategoryId='.$params['cat_id'];
 			$res = $this->Conn->GetRow($sql);
-
+			if ($res === false) {
+				// in case if category is deleted
+				return '';
+			}
+				
 			$block_params['cat_name'] = $res['Name'];
 			$block_params['cat_id'] = $res['CategoryId'];