How to automatically add Categories & Sub Categories in WordPress nav menu

Try out a few menu plugins and see if any existing solutions will meet your needs.
https://www.ads-software.com/plugins/search/category+menu/

A custom coded solution is an option. There are two general approaches. Dynamically add menu items when the menu is output by using the “wp_nav_menu” filter. These items will not appear on the menu edit screen, only menu output.

Or hook the “create_category” action to create persistent menu item posts which appear on the menu edit screen. Also hook “edit_category” action to manage changes to a category term. This latter approach is preferable but is more involved and requires that you learn how menu posts work and how they are associated with a particular menu (it’s done with taxonomy terms).

I got this category walker

// Custom_Walker_Category - in functions.php
class Custom_Walker_Category extends Walker_Category {

        function start_el( &$output, $category, $depth = 0, $args = array(), $id = 0 ) {
                extract($args);
                $cat_name = esc_attr( $category->name );
                $cat_name = apply_filters( 'list-cats', $cat_name, $category );
                $link = '<a href="' . esc_url( get_term_link($category) ) . '" ';
                if ( $use_desc_for_title == 0 || empty($category->description) )
                        $link .= 'title="' . esc_attr( sprintf(__( 'View all posts filed under %s' ), $cat_name) ) . '"';
                else
                        $link .= 'title="' . esc_attr( strip_tags( apply_filters( 'category_description', $category->description, $category ) ) ) . '"';
                $link .= '>';
                $link .= $cat_name . '</a>';
                if ( !empty($feed_image) || !empty($feed) ) {
                        $link .= ' ';
                        if ( empty($feed_image) )
                                $link .= '(';
                        $link .= '<a href="' . esc_url( get_term_feed_link( $category->term_id, $category->taxonomy, $feed_type ) ) . '"';
                        if ( empty($feed) ) {
                                $alt = ' alt="' . sprintf(__( 'Feed for all posts filed under %s' ), $cat_name ) . '"';
                        } else {
                                $title = ' title="' . $feed . '"';
                                $alt = ' alt="' . $feed . '"';
                                $name = $feed;
                                $link .= $title;
                        }
                        $link .= '>';
                        if ( empty($feed_image) )
                                $link .= $name;
                        else
                                $link .= "<img src='$feed_image'$alt$title" . ' />';
                        $link .= '</a>';
                        if ( empty($feed_image) )
                                $link .= ')';
                }
                if ( !empty($show_count) )
                        $link .= ' (' . intval($category->count) . ')';
                if ( 'list' == $args['style'] ) {
                        $output .= "\t<li";
                        $class = 'cat-item cat-item-' . $category->term_id;

                        // YOUR CUSTOM CLASS
                        $termchildren = get_term_children( $category->term_id, $category->taxonomy );
                        if(count($termchildren)>0){
                            $class .=  ' i-have-kids col-lg-2 col-md-4 col-sm-6 col-match-height';
                        }

                        if ( !empty($current_category) ) {
                                $_current_category = get_term( $current_category, $category->taxonomy );
                                if ( $category->term_id == $current_category )
                                        $class .=  ' current-cat';
                                elseif ( $category->term_id == $_current_category->parent )
                                        $class .=  ' current-cat-parent';
                        }
                        $output .=  ' class="' . $class . '"';
                        $output .= ">$link\n";
                } else {
                        $output .= "\t$link<br />\n";
                }
        } // function start_el

} // class Custom_Walker_Category

Usage in header.php

<ul class="lmd-catlist row match-height">

	<?php 
	$excat1 = get_term_by( 'slug', 'highlight', 'category' );
	$exid1 = $excat1->term_id;
	$excat2 = get_term_by( 'slug', 'uncategorized', 'category' );
	$exid2 = $excat2->term_id;
	
	$args = array(
		'orderby' => 'slug',
		'show_count' => 0,
		'hierarchical' => 1, 
		'depth' => 2,
		'exclude' => $exid1.','.$exid2,
		'hide_empty' => 0, 
		'title_li' => '', 
		'hide_title_if_empty' => true,
		'walker' => new Custom_Walker_Category(),
	);
	wp_list_categories($args);?>

</ul></div>

• This reply was modified 4 years, 7 months ago by amrinz.