header.php

<!DOCTYPE html>
<html>
<head>
	<title><?php bloginfo('name');?></title>

	<!-- Bootstrap CSS -->
	<link rel="stylesheet" href="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.5/css/bootstrap.min.css">

	<!-- Wordpress Stylesheet -->
	<link rel="stylesheet" type="text/css" href="<?php bloginfo('stylesheet_url'); ?>">

	<script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/1.11.3/jquery.min.js" type="text/javascript"></script>
	<script src="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.5/js/bootstrap.min.js"></script>
</head>
<body>

<nav class="navbar navbar-default">
  <div class="container">
    <!-- Brand and toggle get grouped for better mobile display -->
    <div class="navbar-header">
      <button type="button" class="navbar-toggle collapsed" data-toggle="collapse" data-target="#bs-example-navbar-collapse-1" aria-expanded="false">
        <span class="sr-only">Toggle navigation</span>
        <span class="icon-bar"></span>
        <span class="icon-bar"></span>
        <span class="icon-bar"></span>
      </button>
      <a class="navbar-brand" href="#"><?php bloginfo('name');?></a>
    </div>

    <!-- Collect the nav links, forms, and other content for toggling -->
    
    <?php
            wp_nav_menu( array(
                'menu'              => 'primary',
                'theme_location'    => 'primary',
                'depth'             => 2,
                'container'         => 'div',
                'container_class'   => 'collapse navbar-collapse',
        		'container_id'      => 'bs-example-navbar-collapse-1',
                'menu_class'        => 'nav navbar-nav',
                'fallback_cb'       => 'wp_bootstrap_navwalker::fallback',
                'walker'            => new wp_bootstrap_navwalker())
            );
        ?>

  </div><!-- /.container-fluid -->
</nav>


<div class="container">