Thank you for your reply,
Have all menu items which not be needed deleted. K2 2.6.5 release provides the ability to create a hidden menu for all users, tags, search and date. See the following article. This option prevents duplicate content. I need this function but does not work to SJ WorldNews Template
getk2.org/blog/1169-k2-v265-released
„All you need to do is simply create a new menu in Joomla! (call it "Hidden" as it won't be directly called from any module) and in there create a K2 menu item pointing to all categories. Give this menu item a nice alias, e.g. "show" (as we also do here on getk2.org). If you do this, K2 is now able to "assign" this menu item as "root" for all such "menu orphan" K2 content such as tags, users, search and date listings.”