New sidebar.php for simple blog using Bootstrap 4

<!-- Sidebar Widgets Column -->
            <div class="col-md-4">
                <!-- Categories Widget -->
                <div class="card my-4">
                    <h5 class="card-header">Categories</h5>
                    <div class="card-block">
                        <div class="row">
                            <div class="col-lg-6">
                                <ul class="list-unstyled mb-0">
                                    <li><a href="#">Web Design</a></li>
                                    <li><a href="#">HTML</a></li>
                                    <li><a href="#">Freebies</a></li>
                                </ul>
                            </div>
                            <div class="col-lg-6">
                                <ul class="list-unstyled mb-0">
                                    <li><a href="#">JavaScript</a></li>
                                    <li><a href="#">CSS</a></li>
                                    <li><a href="#">Tutorials</a></li>
                                </ul>
                            </div>
                        </div>
                    </div>
                </div>

                <!-- Side Widget -->
                <div class="card my-4">
                    <h5 class="card-header">Side Widget 1</h5>
                    <div class="card-block">
                        You can put anything you want inside of these side widgets. They are easy to use, and feature the new Bootstrap 4 card containers!
                    </div>
                </div>

     <!-- Side Widget -->
                <div class="card my-4">
                    <h5 class="card-header">Side Widget 2</h5>
                    <div class="card-block">
                        You can put anything you want inside of these side widgets. They are easy to use, and feature the new Bootstrap 4 card containers!
                    </div>
                </div>

</div> <!-- End col-md-4 -->