If you mean putting all 4 tabs into one window, I don't think there is a way at the moment.
The new filters are nice. What would be nicer is the ability to extend your chat window to its maximum height by one click of a button, switch between tabs by one click of a button, and minimize the window back to normal by another click of a button. Yup, just like in XI. I loved that. It was SO much faster to toggle between your normal chat tab, your tells tab, your party chat tab, and your linkshell chat tab.
I hope they see to this in the Dec update. =/