Multiple categories with thumbnail image

I′m around this for days, here’s the thing:
I want to show in one page all the categories and their posts, but I want the categories to show, at left, a thumbnail image as well for each category.
I’m using this code to show all categories and posts:

<?php

$cat_args=array(
'orderby' => 'none',
'order' => 'DESC'
);
					$categories=get_categories($cat_args);
foreach($categories as $category){
$args=array(
'showposts' => -1,
'orderby' => 'none',
'order' => 'DESC',
'category__in' => array($category->term_id),
'caller_get_posts'=>1
); 

echo '<div id="categorias">';	

echo '<div class="lista-produtos">';
							$posts=get_posts($args);
if ($posts) {

echo '<div class="titulo-categorias"> ' . $category->name . ' </div> ';
foreach($posts as $post) {
							  setup_postdata($post); ?>

<li><a>" rel="bookmark" title="Permanent Link to <?php the_title_attribute(); ?>"><?php the_title(); ?></a></li>
<?php

} // foreach($posts

echo '</div>';
} // if ($posts
echo '</div>';

} // foreach($categories

?>

———————————————————————-

But I want to mixe it with WCK plugin… I′m trying to use this code to get the image:

<?php $categorias = get_post_meta( $post->ID, 'categorias', true );
foreach($categorias as $categorias) {
$attachment_image = wp_get_attachment_image_src($categorias['imagem'], 'medium');
echo '<div id="imagem-cat"><img class="img-tamanho" src="'. $attachment_image[0].'"/></div>';
}
?>

Who can each category item have a left image (different for all itens) with wck?
Please help!
Thanks.

https://www.ads-software.com/extend/plugins/custom-fields-creator/