Attempting to create a WordPress Loop that pulls the category slug from the custom field value of key cbc_category. The loop will pull all post with the category in the value of the custom field and display the featured image, title and excerpt.

category loop

// Add our custom loop
add_action( 'genesis_after_entry_content', 'media317_cat_loop' );

function media317_cat_loop() {
	
	$cbccategory	=	genesis_get_custom_field('cbc_category');
	
	$args = array(
		'category_name'	=> $cbccategory,
		'orderby'       => 'post_date',
		'order'         => 'DESC',
		'posts_per_page'=> '12', // overrides posts per page in theme settings
	);

	$loop = new WP_Query( $args );
	if( $loop->have_posts() ) {

		// loop through posts
		while( $loop->have_posts() ): $loop->the_post(); ?>

		<div class="one-third">
			<a href="<?php the_permalink(); ?>"><img src="<?php get_the_post_thumbnail(); ?>"></a>
			<h4><?php the_title(); ?></h4>
			<p><?php the_excerpt(); ?></p>
		</div>
		<?php
		endwhile;
	}
	
	wp_reset_postdata();

}