What are common challenges faced when trying to change the orientation of a menu from vertical to horizontal in PHP templates?

One common challenge faced when trying to change the orientation of a menu from vertical to horizontal in PHP templates is adjusting the CSS styles to properly display the menu items in a horizontal layout. This may involve changing the display property of the menu items from block to inline or inline-block. Additionally, you may need to adjust the width and padding of the menu items to ensure they are evenly spaced.

<nav>
    <ul style="list-style-type:none;">
        <li style="display:inline; padding: 0 10px;"><a href="#">Home</a></li>
        <li style="display:inline; padding: 0 10px;"><a href="#">About</a></li>
        <li style="display:inline; padding: 0 10px;"><a href="#">Services</a></li>
        <li style="display:inline; padding: 0 10px;"><a href="#">Contact</a></li>
    </ul>
</nav>