page-category.php

<?php
/**
 * Template Name: Category Page
 *
 * A custom page template using custom field or Page Name = Category Name .
 *
 * The "Template Name:" bit above allows this to be selectable
 * from a dropdown menu on the edit page screen.
 */
get_header(); ?>

        <div id="primary">
            <div id="content" role="main">

                <?php the_post(); ?>

                <?php get_template_part( 'content', 'page' ); ?>

                <?php
                    /* Lets see if we have a category to display */
                    global $post;

                    // Save our page posts to use later
                    $tmp_post = $post;
                    $catid = "";

                    // Do we have a category set on the custom fields
                    $meta_cat = get_post_meta($post->ID, 'category', true);

                    // Do we have an order set on the custom fields
                    $asc = get_post_meta($post->ID, 'asc', true);

                    // Do we want to display thumbnail and excerpts list?
                    $excerpt = get_post_meta($post->ID, 'list', true);

                    // Do not rely on what the admin entered
                    $order = $asc ? 'ASC' : 'DESC';
                    if( $meta_cat ) {
                        // If we have a meta value is it numeric or a slug, return an id
                        $catid = is_numeric( $meta_cat ) ? $meta_cat : get_cat_ID($meta_cat);
                    }

                    //Order by
                    $ordered = get_post_meta($post->ID, 'orderby', true);
                    $order_array=array('none','ID','author','title','date','modified','parent','rand','comment_count','menu_order');
                    $orderby = in_array($ordered, $order_array) ? $order : 'ID';

                    // No category ID so use the page slug to find a category
                    if( !$catid ) $catid = get_cat_ID($post->post_name);

                    // If we have a category id we can get the category posts
                    if( $catid  && is_numeric( $catid ) ) {
                        $do_not_show_stickies = 1; // 0 to show stickies
                        $args = array(
                            'cat' => $catid,
                            'paged' => $paged,
                            'orderby' => $orderby,
                            'order' => $order,
                            'ignore_sticky_posts' => $do_not_show_stickies
                        );

                        $wp_query= null;
                        $wp_query = new WP_Query();
                        $wp_query->query( $args );

                        // Output our Query
                        if ( $wp_query->have_posts() ) :

                            twentyeleven_content_nav( 'nav-above' );

                            while ( $wp_query->have_posts() ) :

                                $wp_query->the_post();
                                if( $excerpt ) :
                                    get_template_part( 'content', 'excerpt' );
                                else :
                                    get_template_part( 'content', get_post_format() );
                                endif;
                            endwhile;

                            twentyeleven_content_nav( 'nav-below');
                        endif;
                    }
                ?>

                <?php
                    // Reset the post to the page post
                    $post = $tmp_post;
                ?>

                <?php comments_template( '', true ); ?>

            </div><!-- #content -->
        </div><!-- #primary -->

<?php get_footer(); ?>