Forum:Collapsing headers?

Does anyone know of any way to make a header collapsable (is that a word)? I want to make it possible on the rosters on User:DatNuttyKid/Smash 5 Prediction! because the page is getting hard to read. ---Preceding unsigned comment added by you. Or maybe DatNuttyKid. 00:02, 18 January 2016 (EST)
 * Yah. There is. Mega  Tron1  XD  Decepticon.png 02:36, 18 January 2016 (EST)
 * Gracias! ---Preceding unsigned comment added by you. Or maybe DatNuttyKid. 14:42, 19 January 2016 (EST)

[Show/hide] Open this up in edit mode to see the coding.
Hi Toomai.