Display single question category of AnsPress

category.php

<?php
$category_id = 1; // Replace it.

$question_args = array(
  'tax_query' => array(
    array(
      'taxonomy' => 'question_category',
      'field' => 'id',
      'terms' => array( $category_id ),
    ),
  ),
);

$question_category = get_term( $category_id, 'question_category' );

if ( $question_category ) {
  anspress()->questions = ap_get_questions( $question_args );

  /**
   * This action can be used to show custom message before category page.
   *
   * @param object $question_category Current question category.
   * @since 1.4.2
   */
  do_action( 'ap_before_category_page', $question_category );

  include( ap_get_theme_location( 'addons/category/single-category.php' ) );
}