Wordpress site hk.

<?php foreach(get_categories() as $all_cat) {  $cat_ids[] = $all_cat->term_id; } 
    $this_cat = get_query_var('cat'); 
    $this_cat_position = array_search( $this_cat, $cat_ids ); ?>

<?php $prev_cat_position = $this_cat_position -1; 
        if( $prev_cat_position >=0 ) { 
        $prev_cat_id = array_slice( $cat_ids, $prev_cat_position, 1 ); 
      echo '<a data-test="test" rel="nofollow" style="word-wrap: break-word; text-decoration: underline;" target="_blank" onclick="return dhExternalLinkRedirect(this)" href="/ExternalLinkRedirect?module=pgdcode&messageId=89278027&url=' . get_category_link($prev_cat_id[0]) . '" data-href="' . get_category_link($prev_cat_id[0]) . '">« ' . get_category($prev_cat_id[0])->name . '</a>'; } ?>

<?php $next_cat_position = $this_cat_position +1; 
        if( $next_cat_position < count($cat_ids) ) { 
        $next_cat_id = array_slice( $cat_ids, $next_cat_position, 1 ); 
  echo '<a data-test="test" rel="nofollow" style="word-wrap: break-word; text-decoration: underline;" target="_blank" onclick="return dhExternalLinkRedirect(this)" href="/ExternalLinkRedirect?module=pgdcode&messageId=89278027&url=' . get_category_link($next_cat_id[0]) . '" data-href="' . get_category_link($next_cat_id[0]) . '">' . get_category($next_cat_id[0])->name . ' »</a>'; } ?>