How to put vertical open and close text in slidenav menu?

I need to create a sidebar menu which is like this when it’s close

And it’s like this when it’s open.

What you recommand for create this menu? Can you send me some examples? I couldn’t find.

Hello, you will need some JavaScript to achieve that result, so this might be a good starting point SideBar. If you want it to be exactly like this you’ll need some more styling. Hope that helps.