How to get a list of post categories while disabling one of them?

Question

WordPress

Here is the recording cycle, I display it as the news of the day, however, each news of the day has its own category, and therefore in the link to the post category I need to bypass it and show the native category. How to disable this category in the submission of the name and link of the post category?

<?php  $query2 = new WP_Query( array( 'posts_per_page' => 1, 'cat'=> 15 ) );?>
                                    <?php  if( $query2->have_posts() ){
                                    while( $query2->have_posts() ){
                                    $query2->the_post();

                                   $cat = get_the_category();
                                    $cat_ID= $cat[0]->term_id;?>

                                    <div class="image-main-news">
                                        <a href="<?php the_permalink() ?>">
                                            <?php if(get_the_post_thumbnail_url($post->ID)) echo get_the_post_thumbnail( $attr); else echo ' <img alt="#" src="http://blogprogram.ru/wp-content/uploads/2016/05/noimg.png">'; ?>
                                        </a>
                                    </div>
                                    <div class="header-news">
                                        <div class="news-day">

                                            <div class="news-day-title">
                                                <h3>Новость дня</h3>
                                                <a class="category-news" href="<?= get_term_link($cat[0])?>"><?= get_cat_name($cat_ID);?></a>
                                            </div>
                                            <div class="title-news-day">
                                                <h2><a href="<?php the_permalink() ?>"><?php the_title(); ?></a></h2>
                                            </div>
                                        </div>
                                        <?php }
                                        wp_reset_postdata();
                                        } ?>