if (is_user_logged_in() && $args->theme_location == 'primary') {
        $items .= '<li><a href="'. wp_logout_url() .'">Log Out</a></li>';
    }
    elseif (!is_user_logged_in() && $args->theme_location == 'primary') {
        $items .= '<li><a href="'. site_url('wp-login.php') .'">Log In</a></li>';
    }

  
  
  
  <code><a href="<?php echo wp_logout_url( get_permalink() ); ?>" title="Log out of this account">Log out &raquo;</a></p></code>