Wordpress dynamic code for Bootstrap 3 Accordion

function accordion_list_shortcode($atts){
    extract( shortcode_atts( array(
        'category' => '',
        ), $atts, 'accordion-content' ) );
    $q = new WP_Query(
        array('posts_per_page' => '5', 'post_type' => 'accordion_items', 'accordion_category' => $category)
        );
    $list = '<dl class="accordion toggles">';
        while($q->have_posts()) : $q->the_post();
        $idd = get_the_ID();
        $list .= '


        <dt class="accordion-trigger"><i class="fa fa-facebook"></i>'.get_the_title().'</dt>
        <dd class="accordion-content">
            <p>'.get_the_content().'</p>
        </dd>


        ';
        endwhile;
    $list.= '</dl>';
    wp_reset_query();
    return $list;
}
add_shortcode('accordion_list', 'accordion_list_shortcode');