add_filter('nectar_post_grid_excerpt','salient_child_cpt_cat_output');

function salient_child_cpt_cat_output($output) {
  global $post;

  $category_markup = '<span class="meta-category">';

  $cpt_categories = get_the_terms($post->id,"YOUR_TAXONOMY_SLUG");

  if ( !empty($cpt_categories) ){

    foreach ( $cpt_categories as $term ) {

      if( isset($term->slug) ) {
        $category_markup .= '<a class="' . esc_attr( $term->slug ) . '" href="' . esc_url( get_category_link( $term->term_id ) ) . '">' . esc_html( $term->name ) . '</a>';
      }
    }

  }

  $category_markup .= '</span>';

  return $category_markup . $output;
}