Customizing Boostrap Code :
<!-- Custom Sidebar -->
<div class="bg-light border-right" id="sidebar-wrapper">
<div class="sidebar-heading"><strong><?= __('Admin Panel') ?></strong></div>
<div class="list-group list-group-flush">
<a href="#" id = "dashboard-tab-btn" class="tablinks list-group-item list-group-item-action active"><?= __('Dashboard') ?></a>
<a href="#" id = "users-tab-btn" class="tablinks list-group-item list-group-item-action"><?= __('Users') ?></a>
<a href="#" id = "instructors-tab-btn" class="tablinks list-group-item list-group-item-action"><?= __('Instructors') ?></a>
<a href="#" id = "courses-tab-btn" class="tablinks list-group-item list-group-item-action"><?= __('Courses') ?></a>
<a href="#" id = "enrolled-tab-btn" class="tablinks list-group-item list-group-item-action"><?= __('Enrolled Students') ?></a>
<a href="#" id = "instruct-courses-tab-btn" class="tablinks list-group-item list-group-item-action"><?= __('Instructor Courses') ?></a>
<a href="#" id="transactions-tab-btn" class="tablinks list-group-item list-group-item-action"><?= __('Transactions') ?></a>
</div>
</div>
To customize the background-color of active list items, add the following code snippet to your CSS:
.active{
background-color: #00cccc;
}