Just Sharing ...I
edited joomla \ components \ com_k2 \ templates \ default \ item.php on
line 254, to avoid setting the list items as "odd" or "even". I have just delete this:<? Php echo ($ key% 2)? "Odd": "even";?>So I replaced it with this:id = <? php echo $ extraField-> name;?>This was the way I found to have an ID for each Extra-Field, so that I could control them by CSS.That's all.