Make webpage editable for users

I want to make a website editable by users, like editing submenues and sub-submeunes and different content on the website. I have got TinyMCE, problem is I cant find a way to make spesific content on the webpage editable with the TinyMCE, also how can I make it so users can easily add and delete submenues and sub-submenues?
If ennyone could point me in the right dirrection, I would appreciate it.
I cant seem to find enny information about this on youtube or google.

I think it would be useful to post your existing website so that we know what you are trying to make editable.