K2 | The powerful content extension for Joomla! developed by JoomlaWorks

It's a hack because need to modify K2 and Joomla! core files. All files are attached to this post, all changes are commented in files.

1. In  /libraries/joomla/html/html/select.php after line 125
2. In  /administrator/components/com_k2/models/extrafield.php  in lines: 60, 298, 224
3. In  /administrator/components/com_k2/views/extrafield/view.html.php in line 47
4. In  /administrator/components/com_k2/views/extrafields/view.html.php in line 72
5. In  /media/k2/assets/js/k2.js in line 523
6. In  /components/com_k2/models/item.php in line 1035
7. In  /administratorllanguage/en-GB/en-BG.com_k2.ini in line 445