thanks to dear member @sarisan submitted a new resource:
Multiple Categories for K2 – Joomla! K2 plugin
With this Joomla! plugin, you can assign multiple categories for K2 items. This plugin leaves the K2 core and the template files untouched. The categories are also displayed at the backend and are countable.
With this Joomla! plugin, you can assign multiple categories for K2 items. This plugin leaves the K2 core and the template files untouched. The categories are also displayed at the backend and are countable.