A custom WordPress nav walker class to implement the Yamm 3 bootstrap mega menu navigation style in a custom theme using the WordPress built in menu manager.
##NOTE
This is a utility class that is intended to format your WordPress theme menu with the correct syntax and classes to utilize the Bootstrap dropdown navigation, and does not include the required Bootstrap JS files or Yamm 3 files. You will have to include them manually.
Place yamm-nav-walker.php in your WordPress theme folder /wp-content/your-theme/
Open your WordPress themes functions.php file /wp-content/your-theme/functions.php and add the following code:
// Register Custom Navigation Walker
require_once('yamm-nav-walker.php');Update your wp_nav_menu() function in header.php to use the new walker by adding a "walker" item to the wp_nav_menu array.
<?php
wp_nav_menu( array(
'menu' => 'primary',
'theme_location' => 'primary',
'depth' => 4,
'container' => 'div',
'container_class' => 'collapse navbar-collapse',
'container_id' => 'bs-example-navbar-collapse-1',
'menu_class' => 'nav navbar-nav yamm',
'fallback_cb' => 'Yamm_Nav_Walker_menu_fallback',
'walker' => new Yamm_Nav_Walker())
);
?>Your menu will now be formatted with the correct syntax and classes to implement Bootstrap dropdown navigation.
You will also want to declare your new menu in your functions.php file.
register_nav_menus( array(
'primary' => __( 'Primary Menu', 'THEMENAME' ),
) );Typically the menu is wrapped with additional markup, here is an example of a navbar-fixed-top menu that collapse for responsive navigation.
<nav class="navbar navbar-default" role="navigation">
<div class="container-fluid">
<!-- Brand and toggle get grouped for better mobile display -->
<div class="navbar-header">
<button type="button" class="navbar-toggle" data-toggle="collapse" data-target="#bs-example-navbar-collapse-1">
<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 echo home_url(); ?>">
<?php bloginfo('name'); ?>
</a>
</div>
<?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' => 'Yamm_Nav_Walker_menu_fallback',
'walker' => new Yamm_Nav_Walker())
);
?>
</div>
</nav>To change your menu style add Bootstrap nav class names to the menu_class declaration.
Review options in the Bootstrap docs for more information on nav classes https://getbootstrap.com/components/#nav
You can also use the full width walker like so:
<?php
wp_nav_menu( array(
'menu' => 'primary',
'theme_location' => 'primary',
'depth' => 4,
'container' => 'div',
'container_class' => 'collapse navbar-collapse',
'container_id' => 'bs-example-navbar-collapse-1',
'menu_class' => 'nav navbar-nav yamm',
'fallback_cb' => 'Yamm_Fw_Nav_Walker_menu_fallback',
'walker' => new Yamm_Fw_Nav_Walker())
);
?>