Menu and submenu PHP for Wordpress - php

Question

I have a HTML structure and I want to change those menu elements for a WordPress Menu maintaining the class and id's, and I want to change these elements for the ones I obtain using wp_get_nav_menu_items() and for each, but don't know how.
The thing is changing all Categories for parent and subitem WP menu category and so on, until 5 level of depth that has the menu. For example, replace Devices with first item depth 0, inside change Mobile Phones for second level, and go changing.
<!-- mp-menu -->
<nav id="mp-menu" class="mp-menu mp-overlap">
<div class="mp-level mp-level-open" data-level="1">
<h2 class="icon icon-world">All Categories</h2>
<ul>
<li class="icon icon-arrow-left">
<a class="icon icon-display" href="#">Devices</a>
<div class="mp-level" data-level="2">
<h2 class="icon icon-display">Devices</h2>
<a class="mp-back" href="#">back</a>
<ul>
<li class="icon icon-arrow-left">
<a class="icon icon-phone" href="#">Mobile Phones</a>
<div class="mp-level">
<h2>Mobile Phones</h2>
<a class="mp-back" href="#">back</a>
<ul>
<li>Super Smart Phone</li>
<li>Thin Magic Mobile</li>
<li>Performance Crusher</li>
<li>Futuristic Experience</li>
</ul>
</div>
</li>
<li class="icon icon-arrow-left">
<a class="icon icon-tv" href="#">Televisions</a>
<div class="mp-level">
<h2>Televisions</h2>
<a class="mp-back" href="#">back</a>
<ul>
<li>Flat Superscreen</li>
<li>Gigantic LED</li>
<li>Power Eater</li>
<li>3D Experience</li>
<li>Classic Comfort</li>
</ul>
</div>
</li>
<li class="icon icon-arrow-left">
<a class="icon icon-camera" href="#">Cameras</a>
<div class="mp-level">
<h2>Cameras</h2>
<a class="mp-back" href="#">back</a>
<ul>
<li>Smart Shot</li>
<li>Power Shooter</li>
<li>Easy Photo Maker</li>
<li>Super Pixel</li>
</ul>
</div>
</li>
</ul>
</div>
</li>
<li class="icon icon-arrow-left">
<a class="icon icon-news" href="#">Magazines</a>
<div class="mp-level">
<h2 class="icon icon-news">Magazines</h2>
<a class="mp-back" href="#">back</a>
<ul>
<li>National Geographic</li>
<li>Scientific American</li>
<li>The Spectator</li>
<li>The Rambler</li>
<li>Physics World</li>
<li>The New Scientist</li>
</ul>
</div>
</li>
<li class="icon icon-arrow-left">
<a class="icon icon-shop" href="#">Store</a>
<div class="mp-level">
<h2 class="icon icon-shop">Store</h2>
<a class="mp-back" href="#">back</a>
<ul>
<li class="icon icon-arrow-left">
<a class="icon icon-t-shirt" href="#">Clothes</a>
<div class="mp-level">
<h2 class="icon icon-t-shirt">Clothes</h2>
<a class="mp-back" href="#">back</a>
<ul>
<li class="icon icon-arrow-left">
<a class="icon icon-female" href="#">Women's Clothing</a>
<div class="mp-level">
<h2 class="icon icon-female">Women's Clothing</h2>
<a class="mp-back" href="#">back</a>
<ul>
<li>Tops</li>
<li>Dresses</li>
<li>Trousers</li>
<li>Shoes</li>
<li>Sale</li>
</ul>
</div>
</li>
<li class="icon icon-arrow-left">
<a class="icon icon-male" href="#">Men's Clothing</a>
<div class="mp-level">
<h2 class="icon icon-male">Men's Clothing</h2>
<a class="mp-back" href="#">back</a>
<ul>
<li>Shirts</li>
<li>Trousers</li>
<li>Shoes</li>
<li>Sale</li>
</ul>
</div>
</li>
</ul>
</div>
</li>
<li>
<a class="icon icon-diamond" href="#">Jewelry</a>
</li>
<li>
<a class="icon icon-music" href="#">Music</a>
</li>
<li>
<a class="icon icon-food" href="#">Grocery</a>
</li>
</ul>
</div>
</li>
<li><a class="icon icon-photo" href="#">Collections</a></li>
<li><a class="icon icon-wallet" href="#">Credits</a></li>
</ul>
</div>
</nav>
<!-- /mp-menu -->

Answer 1

you can customize nav menu walker class of wordpress to put your N level HTML menu structure. Hers is a example of bootstrap nav walker
if (!class_exists('BootstrapBasicMyWalkerNavMenu')) {
class BootstrapBasicMyWalkerNavMenu extends Walker_Nav_Menu
{
//Overwrite display_element function to add has_children attribute. Not needed in >= Wordpress 3.4
/**
* #link https://gist.github.com/duanecilliers/1817371 copy from this url
*/
function display_element($element, &$children_elements, $max_depth, $depth = 0, $args, &$output)
{
if (!$element)
return;
$id_field = $this->db_fields['id'];
//display this element
if (is_array($args[0]))
$args[0]['has_children'] = !empty($children_elements[$element->$id_field]);
else if (is_object($args[0]))
$args[0]->has_children = !empty($children_elements[$element->$id_field]);
$cb_args = array_merge(array(&$output, $element, $depth), $args);
call_user_func_array(array(&$this, 'start_el'), $cb_args);
$id = $element->$id_field;
// descend only when the depth is right and there are childrens for this element
if (($max_depth == 0 || $max_depth > $depth + 1) && isset($children_elements[$id])) {
foreach ($children_elements[$id] as $child) {
if (!isset($newlevel)) {
$newlevel = true;
//start the child delimiter
$cb_args = array_merge(array(&$output, $depth), $args);
call_user_func_array(array(&$this, 'start_lvl'), $cb_args);
}
$this->display_element($child, $children_elements, $max_depth, $depth + 1, $args, $output);
}
unset($children_elements[$id]);
}
if (isset($newlevel) && $newlevel) {
//end the child delimiter
$cb_args = array_merge(array(&$output, $depth), $args);
call_user_func_array(array(&$this, 'end_lvl'), $cb_args);
}
//end this element
$cb_args = array_merge(array(&$output, $element, $depth), $args);
call_user_func_array(array(&$this, 'end_el'), $cb_args);
}// display_element
/**
* #link https://gist.github.com/duanecilliers/1817371 copy from this url
*/
public function start_el(&$output, $item, $depth = 0, $args = array(), $id = 0)
{
if ((is_object($item) && $item->title == null) || (!is_object($item))) {
return ;
}
$indent = ($depth) ? str_repeat("\t", $depth) : '';
$li_attributes = '';
$class_names = $value = '';
$classes = empty($item->classes) ? array() : (array) $item->classes;
//Add class and attribute to LI element that contains a submenu UL.
if (is_object($args) && $args->has_children) {
//$classes[] = 'dropdown';
$li_attributes .= ' data-dropdown="dropdown"';
}
$classes[] = 'menu-item-' . $item->ID;
//If we are on the current page, add the active class to that menu item.
$classes[] = ($item->current) ? 'active' : '';
//Make sure you still add all of the WordPress classes.
$class_names = join(' ', apply_filters('nav_menu_css_class', array_filter($classes), $item, $args));
$class_names = ' class="' . esc_attr($class_names) . '"';
$id = apply_filters('nav_menu_item_id', 'menu-item-' . $item->ID, $item, $args);
$id = strlen($id) ? ' id="' . esc_attr($id) . '"' : '';
$output .= $indent . '<li' . $id . $value . $class_names . $li_attributes . '>';
//Add attributes to link element.
$attributes = !empty($item->attr_title) ? ' title="' . esc_attr($item->attr_title) . '"' : '';
$attributes .=!empty($item->target) ? ' target="' . esc_attr($item->target) . '"' : '';
$attributes .=!empty($item->xfn) ? ' rel="' . esc_attr($item->xfn) . '"' : '';
$attributes .=!empty($item->url) ? ' href="' . esc_attr($item->url) . '"' : '';
$attributes .= (is_object($args) && $args->has_children) ? ' class="dropdown-toggle" data-toggle="dropdown"' : '';
$item_output = (is_object($args)) ? $args->before : '';
$item_output .= '<a' . $attributes . '>';
$item_output .= (is_object($args) ? $args->link_before : '') . apply_filters('the_title', $item->title, $item->ID) . (is_object($args) ? $args->link_after : '');
$item_output .= (is_object($args) && $args->has_children) ? ' <span class="caret"></span> ' : '';
$item_output .= '</a>';
$item_output .= (is_object($args) ? $args->after : '');
$output .= apply_filters('walker_nav_menu_start_el', $item_output, $item, $depth, $args);
}// start_el
public function start_lvl(&$output, $depth = 0, $args = array())
{
$indent = str_repeat("\t", $depth);
$output .= "\n$indent<ul class=\"sub-menu dropdown-menu\">\n";
}
}
}
How to use this,
<?php wp_nav_menu(array('theme_location' => 'your-menu-location', 'container' => false, 'menu_class' => 'nav navbar-nav', 'walker' => new BootstrapBasicMyWalkerNavMenu())); ?>
Hope this will helps you.
For more information,
Understanding the Walker Class
WP Bootstrap Navwalker
Custom Nav Menu Walker Function