How i dynamic wordpress header menu? the html is in the body..this is situated in header.php

<div class=”collapse navbar-collapse” id=”navbarSupportedContent”> <ul class=”navbar-nav ml-md-auto”> <li class=”nav-item dropdown”> <a class=”nav-link dropdown-toggle” href=”#” id=”navbarDropdown” role=”button” data-toggle=”dropdown” aria-haspopup=”true” aria-expanded=”false”> Dropdown…