Kos koca forumdan bir cevap çıkmadı. R10 halbuki ticaret forumundan çok yardımlaşma forumudur. Neyse sorunu kendim çmzdüm özel bir fonksyion yazmak gerekiyormus. Aynı soruna takılanlar için fonksiyon altta.

    /**
     * Display widget
     */
    function widget( $args, $instance ) {
        $instance = wp_parse_args( $instance, $this->defaults );
        extract( $instance );
        extract( $args );        
        $query_args = array(
            'post_type' => 'post',
            'posts_per_page' => intval($count)
        );
        if ( !empty( $category ) )
            $query_args['tax_query'] = array(
                array(
                    'taxonomy' => 'category',
                    'terms'    => $category,
                ),
            );      
        if ($ids !=  '')       {
            $query_args['post__in'] = explode(",",$ids);
             $query_args['orderby'] = 'post__in';
        }
        $flat_post = new WP_Query( $query_args );
        $classes[] = 'recent-news';
        echo wp_kses_post( $before_widget );
        if ( !empty($title) ) { echo wp_kses_post($before_title).esc_html($title).wp_kses_post($after_title); } ?>        
        <ul class="<?php echo esc_attr(implode(' ', $classes)) ;?> clearfix">  
        <?php if ( $flat_post->have_posts() ) : ?>
            <?php while ( $flat_post->have_posts() ) : $flat_post->the_post(); ?>
                <li class="clearfix">       
                    <div class="thumb">
                        <span class="overlay-pop"></span>
                        <a href="<?php the_permalink(); ?>">
                        <?php 
                        the_post_thumbnail( 'thumbnail' );
                        ?>
                        </a>
                    </div>                                    
                    <div class="text">
                        <?php if ( $show_date ) : ?>
                        <time class="post-date" datetime="<?php esc_attr(the_time( 'c' )); ?>"><?php the_time( 'F d, Y' ); ?></time>
                        <?php endif; ?>  
                        <h6><a href="<?php echo esc_url( get_permalink() ); ?>" rel="bookmark"><?php the_title(); ?></a></h6> 
                        <?php if ( $show_content ) : ?>
                        <p><?php echo wp_trim_words( get_the_content(), 8, '...' ); ?></p>
                        <?php endif; ?>                        
                    </div><!-- /.text -->                        
                </li>
            <?php endwhile; ?>
            <?php wp_reset_postdata(); ?>
            <?php else : ?>  
            <?php printf( '<li>%s</li>',esc_html__('Oops, category not found.', 'thmes' )); ?>
        <?php endif; ?>        
        </ul>        
        <?php echo wp_kses_post( $after_widget );
    }

Kodu kullanacaklar widget setting ayarlarını kendine göre özelleştirebilir