<div class="widget w-socials">
    <h6 class="title">Other Social Networks:</h6>
<?php if (!empty($facebook)) {
    echo "<a href='https://{$facebook}' class='social-item bg-facebook'><i class='fab fa-facebook-f' aria-hidden='true'></i>Facebook</a>";
}   ?>
<?php if (!empty($twitter)) {
    echo "<a href='https://{$twitter}' class='social-item bg-twitter'><i class='fab fa-twitter' aria-hidden='true'></i>Twitter</a>";
}   ?>
<?php if (!empty($instagram)) {
    echo "<a href='https://{$instagram}' class='social-item bg-dribbble'><i class='fab fa-instagram' aria-hidden='true'></i>Instagram</a>";
}   ?>
</div>