$defaults_param = array(
'numberposts' => -1,
'post_type' => 'post',
'category' => 40 ,
'suppress_filters' => false
);
$get_featured_post = get_posts($defaults_param);
$espbc = get_sub_field('add_posts_by_category');
$defaults_param = array(
//'numberposts' => -1,
'post_type' => 'post',
'category' => $espbc,
'posts_per_page' => 6,
'suppress_filters' => false
);
$catPost = get_posts($defaults_param);
<?php query_posts('category_name=CATEGORYNAME&showposts=5');
while (have_posts()) : the_post(); ?>
the_title(); // To display the title of all posts that have category name selected
the_content(); // To display the content of all posts that have category name selected
<?php endwhile; ?>