see all the post in one catagory with out pagination code example

Example 1: see all the post in one catagory with out pagination

<?php $posts = new WP_Query(array('cat'=>20,'posts_per_page'=>-1)); ?>

Example 2: see all the post in one catagory with out pagination

<?php
query_posts(array('cat'=>20,'posts_per_page'=>-1));
?>