Display a Genesis custom loop within a shortcode.

functions.php

<?php

add_action('init' , 'jspt_init');
/**
 * Callback for WordPress 'init' action.
 *
 * Reigster the custom shortcode.
 * 
 * @return void
 */
function jspt_init() {

    add_shortcode( 'jssd-in-memoriam', 'jspt_memoriam_shortcode_handler' );

}

/**
 * Callback for WordPress add_shortcode() function.
 * 
 * @param  attay    $atts   The shortcode attributes.
 * @return string           The shortcode output.
 */
function jspt_memoriam_shortcode_handler( $atts ) {
    
    extract(
        shortcode_atts(
            array('ffld' => false), 
            $atts
        )
    );

    if ( $ffld === false )
        return 'You must specify ffld="yes" or ffld="no" with in the shortcode.';
        
    $args = array (
        'post_status'    => 'publish', 
        'post_type'      => 'memoriam',
        'posts_per_page' => -1, // Unlimited posts per page
        'meta_key'       => 'wpcf-deceased-date',
        'orderby'        => 'meta_value_num', // Order by Deceased Date
        'order'          => 'DESC',
        'meta_query'     => array(
            array(
                'key'     => 'wpcf-firefighter-line-of-duty', // Firefighters Line of Duty only
                'value'   => $ffld,                                                   // yes or no
                'compare' => 'IN'
            )
        )
    );
    
    ob_start();
    
    genesis_custom_loop( $args );

    $html = ob_get_clean();
    
    return $html;

}