Moving The Register and Login???

I have been racking my brain trying to find anything close to what I want to do.  Where do I go to change the code for moving my register and login links?

This is the coding I want to change:

<div id="brdmenu" class="inbox">
            <ul>
                <li id="navindex"><a href="index.php">Index</a></li>
                <li id="navuserlist"><a href="userlist.php">User list</a></li>
                <li id="navsearch"><a href="search.php">Search</a></li>
                <li id="navregister"><a href="register.php">Register</a></li>
                <li id="navlogin"><a href="login.php">Login</a></li>
            </ul>
        </div>
But I don't know where I can find it, to change the code.  Thank you for your time.