Вместо вызова вкладки из кнопок вашего портфеля,
<a class="nav-link" id="v-pills-project1-tab" data-toggle="pill" href="#v-pills-project1" role="tab">Project 1</a>
вызывает событие щелчка на вкладках в JavaScript
работает фрагмент ниже:
$(document).ready(function() {
$("#myBtn1").click(function() {
$("#v-pills-project1-tab").trigger('click');
});
$("#myBtn2").click(function() {
$("#v-pills-project2-tab").trigger('click');
});
$("#myBtn3").click(function() {
$("#v-pills-project3-tab").trigger('click');
});
});
<link rel="stylesheet" href="https://stackpath.bootstrapcdn.com/bootstrap/4.3.1/css/bootstrap.min.css" integrity="sha384-ggOyR0iXCbMQv3Xipma34MD+dH/1fQ784/j6cY/iJTQUOhcWr7x9JvoRxT2MZw1T" crossorigin="anonymous">
<div class container>
<div class="row">
<div class="col-3">
<div class="nav flex-column nav-pills" id="v-pills-tab" role="tablist">
<a class="nav-link active" id="v-pills-all-tab" data-toggle="pill" href="#v-pills-all" role="tab">
All
</a>
<a class="nav-link" id="v-pills-project1-tab" data-toggle="pill" href="#v-pills-project1" role="tab">
Project 1
</a>
<a class="nav-link" id="v-pills-project2-tab" data-toggle="pill" href="#v-pills-project2" role="tab">
Project 2
</a>
<a class="nav-link" id="v-pills-project3-tab" data-toggle="pill" href="#v-pills-project3" role="tab">
Project 3
</a>
</div>
</div>
<div class="col-9">
<div class="tab-content" id="v-pills-tabContent">
<div class="tab-pane fade show active" id="v-pills-all" role="tabpanel">
<div class="row">
<a class="col-4" data-toggle="pill" id='myBtn1'>project1</a>
<a class="col-4" data-toggle="pill" id='myBtn2'>project2</a>
<a class="col-4" data-toggle="pill" id='myBtn3'>project3</a>
</div>
</div>
<div class="tab-pane fade" id="v-pills-project1" role="tabpanel">1</div>
<div class="tab-pane fade" id="v-pills-project2" role="tabpanel">2</div>
<div class="tab-pane fade" id="v-pills-project3" role="tabpanel">3</div>
</div>
</div>
</div>
</div>
<script src="https://code.jquery.com/jquery-3.3.1.slim.min.js" integrity="sha384-q8i/X+965DzO0rT7abK41JStQIAqVgRVzpbzo5smXKp4YfRvH+8abtTE1Pi6jizo" crossorigin="anonymous"></script>
<script src="https://cdnjs.cloudflare.com/ajax/libs/popper.js/1.14.7/umd/popper.min.js" integrity="sha384-UO2eT0CpHqdSJQ6hJty5KVphtPhzWj9WO1clHTMGa3JDZwrnQq4sF86dIHNDz0W1" crossorigin="anonymous"></script>
<script src="https://stackpath.bootstrapcdn.com/bootstrap/4.3.1/js/bootstrap.min.js" integrity="sha384-JjSmVgyd0p3pXB1rRibZUAYoIIy6OrQ6VrjIEaFf/nJGzIxFDsf4x0xIM+B07jRM" crossorigin="anonymous"></script>