nav.php

<div id="nav-dropdown">
	<div id="dropdown-wrapper">
		<nav id="dropdown" class="container">
			<nav id="site-navigation" class="navbar navbar-default" role="navigation">
				<div class="navbar-header">
					<button type="button" class="navbar-toggle" data-toggle="collapse" data-target="#primary-nav">
						<span class="sr-only">Toggle navigation</span>
						<span class="menu-icon">
							<span class="icon-bar"></span>
							<span class="icon-bar"></span>
							<span class="icon-bar"></span>
						</span>
						<span class="menu-label">Menu</span>
					</button>
					<a class="navbar-brand visible-xs" href="<?php echo esc_url( home_url( '/' ) ); ?>"><?php bloginfo( 'name' ); ?></a>
				</div>
				<a class="skip-link screen-reader-text sr-only" href="#content">
					<?php _e( 'Skip to content', 'cs' ); ?></a>
				<div class="collapse navbar-collapse" id="primary-nav">
					<?php
						$locations = get_nav_menu_locations();
						$menu_at_primary_location = $locations['primary'];
						$items = wp_get_nav_menu_items( $menu_at_primary_location );
						if(empty($items)){
							echo '<ul class="nav navbar-nav"><li><a href="'.home_url().'">Home</a></li></ul>';
						} else {
							$menu = wp_nav_menu( 
								array(
									'menu_class' => 'nav navbar-nav'.$nav1.' '.$nav2,
									'theme_location' => 'primary', /* where in the theme it's assigned */
									'container' => false, /* container class */
									'fallback_cb' => 'hale_main_nav_fallback',
									'items_wrap' =>	'<ul id="%1$s" class="%2$s"><li><a href="'.home_url().'">Home</a></li>%3$s</ul>',
									'walker' => new Bootstrap_Nav_Walker()/*,
									'with_search' => true*/
								)
							);			
						}
					?>
					<div class="visible-xs-block">
					<div class="navbar-form navbar-right">
						<?php get_search_form(); ?>
					</div>
					</div>
				</div>
			</nav>
		</nav>
	</div>
</div>
<!-- #site-navigation -->