Logout link

Hi,

My users has to sign in to use all the function of my website. I want to know how can i make the link for logout invisible or how to change the slug url. The thing is when i let the cursor on the “Logout button” the link of my login.php (that i already change and you can still see) it can be seen. How can i fix this?

Thanks in advance

The page I need help with: [log in to see the link]