usmdamir

<?php 
            
$arg_cat = array(
	'orderby'      => 'name',
	'order'        => 'ASC',
	'hide_empty'   => 1,
	'exclude'      => '',
	'include'      => '',
	'taxonomy'     => <strong>'MY CUSTOM TAXONOMY NAME'</strong>,
);
$categories = get_categories( $arg_cat );
            
if( $categories ){
        foreach( $categories as $cat ){
				
$arg_posts =  array(
	'orderby'      => 'name',
	'order'        => 'ASC',
	'posts_per_page' => -1,
	'post_type' => <strong>'MY CUSTOM POST NAME'</strong>,
	'post_status' => 'publish',
        'tax_query' => array(
            array(
                'taxonomy' => <strong>'MY CUSTOM TAXONOMY NAME'</strong>,
                'field' => 'ID',
                'terms' => $cat->cat_ID
            )
        )
);
            
$query = new WP_Query( $arg_posts );?>

<?php if ($query->have_posts() ) ?>
            
<h2><?php echo $cat->name; ?></h2>
            
<?php while ( $query->have_posts() ) : $query->the_post(); ?>

<div class="main-page-post">
<a href="<?php the_permalink(); ?>"><?php the_title(); ?></a>
</div>

<?php endwhile; wp_reset_postdata()?>
<?php } } ?>

Thanks!