php - Thumbnail Gallery: Displaying only Main Categories, and not the Sub-Categories -

i using elist wordpress theme.

now on main page, there thumbnail display of categories listed. now, on theme see have no sub-categories under categories, listings

now in theme, have sub-categories, , theme make provision that. see site here , dropdown list next search bar in header see mean subcategories

question:

how list main categories on home page, , not sub-categories of main categories well?

here code of home page part controls thumbnails:

<?php     $elist_categories_args = array( 'hide_empty' => 0 );      if ( 'on' == get_option('elist_listings_hide_empty') ) $elist_categories_args['hide_empty'] = 1;      if ( is_tax() ) {         $et_term = get_queried_object();         $elist_categories_args['child_of'] = $et_term->term_id;     }      $categories = get_categories( 'taxonomy=listing-category' );      $elist_listing_categories = get_terms( 'listing_category', apply_filters( 'listing_categories_args', $elist_categories_args ) );     $elist_category_images = false !== get_option( 'elist_category_images' ) ? (array) get_option( 'elist_category_images' ) : array();     $et_count = 0;      if ( $elist_listing_categories ){ ?>         <section id="listing-categories">             <div class="container clearfix">                 <h1><?php esc_html_e( 'listing categories', 'elist' ); ?></h1>                 <?php foreach( $elist_listing_categories $elist_listing_category ) { ?>                     <?php                         $et_current_term_query = new wp_query(                              array(                                 'post_status' => 'publish',                                 'tax_query' => array(                                         array(                                             'taxonomy' => 'listing_category',                                             'field' => 'id',                                             'terms' => $elist_listing_category->term_id                                         )                                     )                             )                         );                     ?>                      <?php $et_count++; ?>                     <div class="l-category<?php if ( $et_count % 3 == 0 ) echo ' last'; ?>">                         <?php $et_listing_category_link = get_term_link( $elist_listing_category ); ?>                         <?php if ( isset( $elist_category_images[$elist_listing_category->term_id] ) && '' != $elist_category_images[$elist_listing_category->term_id] ) { ?>                             <div class="thumb">                                 <a href="<?php echo esc_url( $et_listing_category_link ); ?>">                                     <img class="item-image" alt="<?php echo esc_attr( $elist_listing_category->name ); ?>" src="<?php echo esc_attr( et_new_thumb_resize( et_multisite_thumbnail( $elist_category_images[$elist_listing_category->term_id] ), 70, 70, '', true ) ); ?>"/>                                     <span class="overlay"></span>                                 </a>                             </div>  <!-- end .thumb -->                         <?php } ?>                         <div class="description">                             <h2><a href="<?php echo esc_url( $et_listing_category_link ); ?>"><?php echo esc_html( $elist_listing_category->name ); ?></a></h2>                             <p class="info"><?php if ( 1 == $et_current_term_query->found_posts ) printf( __('%d listing','elist'), $et_current_term_query->found_posts ); else printf( __('%d listings'), $et_current_term_query->found_posts ); ?></p>                             <?php if ( '' != $elist_listing_category->description ) { ?>                                 <p><?php echo esc_html( $elist_listing_category->description ); ?></p>                             <?php } ?>                         </div> <!-- end .description -->                         </div> <!-- end .l-category -->                 <?php } ?>             </div> <!-- end .container -->         </section> <!-- end #listing-categories --> <?php } ?> 

to pinpoint out of above code, here html part holds dynamically populated thumbnail:

<div class="l-category<?php if ( $et_count % 3 == 0 ) echo ' last'; ?>">                         <?php $et_listing_category_link = get_term_link( $elist_listing_category ); ?>                         <?php if ( isset( $elist_category_images[$elist_listing_category->term_id] ) && '' != $elist_category_images[$elist_listing_category->term_id] ) { ?>                             <div class="thumb">                                 <a href="<?php echo esc_url( $et_listing_category_link ); ?>">                                     <img class="item-image" alt="<?php echo esc_attr( $elist_listing_category->name ); ?>" src="<?php echo esc_attr( et_new_thumb_resize( et_multisite_thumbnail( $elist_category_images[$elist_listing_category->term_id] ), 70, 70, '', true ) ); ?>"/>                                     <span class="overlay"></span>                                 </a>                             </div>  <!-- end .thumb -->                         <?php } ?>                         <div class="description">                             <h2><a href="<?php echo esc_url( $et_listing_category_link ); ?>"><?php echo esc_html( $elist_listing_category->name ); ?></a></h2>                             <p class="info"><?php if ( 1 == $et_current_term_query->found_posts ) printf( __('%d listing','elist'), $et_current_term_query->found_posts ); else printf( __('%d listings'), $et_current_term_query->found_posts ); ?></p>                             <?php if ( '' != $elist_listing_category->description ) { ?>                                 <p><?php echo esc_html( $elist_listing_category->description ); ?></p>                             <?php } ?>                         </div> <!-- end .description -->                         </div> <!-- end .l-category --> 

given code presented, there seem 2 possibilities.

1) modify wp_query arguments

$et_current_term_query = new wp_query(      array(         'post_status' => 'publish',         'tax_query' => array(                 array(                     'taxonomy' => 'listing_category',                     'field' => 'id',                     'terms' => $elist_listing_category->term_id,                     'include_children' => false // <--- add                 )             )     ) ); 

2) modify listing terms call used get_terms

$elist_categories_args = array( 'hide_empty' => 0, 'parent' => 0 ); // add parent