<ul class="nav mb-3">
                <li class="nav-item">
                    <a class="nav-link active" aria-current="page" href="#">Active</a>
                </li>
                <li class="nav-item">
                    <a class="nav-link" href="#">Link</a>
                </li>
                <li class="nav-item">
                    <a class="nav-link" href="#">Link</a>
                </li>
                <li class="nav-item">
                    <a class="nav-link disabled" aria-disabled="true">Disabled</a>
                </li>
            </ul>
            <ul class="nav justify-content-center mb-3">
                <li class="nav-item">
                    <a class="nav-link active" aria-current="page" href="#">Active</a>
                </li>
                <li class="nav-item">
                    <a class="nav-link" href="#">Link</a>
                </li>
                <li class="nav-item">
                    <a class="nav-link" href="#">Link</a>
                </li>
                <li class="nav-item">
                    <a class="nav-link disabled" aria-disabled="true">Disabled</a>
                </li>
            </ul>
            <ul class="nav justify-content-end">
                <li class="nav-item">
                    <a class="nav-link active" aria-current="page" href="#">Active</a>
                </li>
                <li class="nav-item">
                    <a class="nav-link" href="#">Link</a>
                </li>
                <li class="nav-item">
                    <a class="nav-link" href="#">Link</a>
                </li>
                <li class="nav-item">
                    <a class="nav-link disabled" aria-disabled="true">Disabled</a>
                </li>
            </ul>
                                

            <nav class="nav flex-column">
                <a class="nav-link active" aria-current="page" href="#">Active</a>
                <a class="nav-link" href="#">Link</a>
                <a class="nav-link" href="#">Link</a>
                <a class="nav-link disabled" aria-disabled="true">Disabled</a>
            </nav>
                                

            <ul class="nav nav-tabs mb-3">
                <li class="nav-item">
                    <a class="nav-link active" aria-current="page" href="#">Active</a>
                </li>
                <li class="nav-item">
                    <a class="nav-link" href="#">Link</a>
                </li>
                <li class="nav-item">
                    <a class="nav-link" href="#">Link</a>
                </li>
                <li class="nav-item">
                    <a class="nav-link disabled" aria-disabled="true">Disabled</a>
                </li>
            </ul>
            
            <ul class="nav nav-pills mb-3">
                <li class="nav-item">
                    <a class="nav-link active" aria-current="page" href="#">Active</a>
                </li>
                <li class="nav-item">
                    <a class="nav-link" href="#">Link</a>
                </li>
                <li class="nav-item">
                    <a class="nav-link" href="#">Link</a>
                </li>
                <li class="nav-item">
                    <a class="nav-link disabled" aria-disabled="true">Disabled</a>
                </li>
            </ul>
            
            <ul class="nav nav-underline">
                <li class="nav-item">
                    <a class="nav-link active" aria-current="page" href="#">Active</a>
                </li>
                <li class="nav-item">
                    <a class="nav-link" href="#">Link</a>
                </li>
                <li class="nav-item">
                    <a class="nav-link" href="#">Link</a>
                </li>
                <li class="nav-item">
                    <a class="nav-link disabled" aria-disabled="true">Disabled</a>
                </li>
            </ul>