Change product tabs

I have a problem with Products Tabs on Klasik Theme. The problem is how it’s display. I added a Custom Tabs Products to my theme (already tried the plugin, is not the plugin) and now I have a few others tabs. I want to replace the box with the new tab content. Right now, they display the next tab down, and i want to replace. I tried on wordpress theme Twenty Fourteen and working how I want that’s why it’s not the plugin. Also, tried too the debug, and didn’t resolve. So, i think it’s something on layout theme, and i want to know how to change it.