@Jesse
Thanks, I used from the beginning correct code
@Jay
Thanks, your item.php file is the same like mine, it redirects me to right page -....mypage.../item/activate/19
but actually Im on the search page - Your search result...
Jay you made a little typo at github:
<a href="<?php echo osc_item_deactivate_url();?>" ><?php _e('Dectivate', 'modern'); ?></a>
<?php } ?>
No idea what am I doing wrong, thanks guys