Grid Loop with Features/Teasers

archive.php

<?php

add_filter( 'post_class', 'be_archive_post_classes' );
/**
 * Archive Post Classes
 *
 * @param array $classes
 * @return array
 */
function be_archive_post_classes( $classes ) {

	$features = 2;
	// Number of teasers is what's left over
	$columns_of_teasers = 2;


	global $wp_query;
	if( $wp_query->query_vars['paged'] == 0 && $wp_query->current_post < $features )
		$classes[] = 'feature';
	else {
		$classes[] = 'teaser';
		if( 0 == $wp_query->current_post || 0 == $wp_query->current_post % $columns_of_teasers )
			$classes[] = 'left';
		else
			$classes[] = 'right';
	}
	
	$page = $wp_query->query_vars['paged'] ? $wp_query->query_vars['paged'] : 1;
	// Adds a class of 'last' to the last teaser
	if( ( ( $wp_query->query_vars['posts_per_page'] - 1 ) == $wp_query->current_post) || ( $wp_query->query_vars['posts_per_page'] * ( $page - 1 ) + ( $wp_query->current_post + 1 ) == $wp_query->found_posts ) )
		$classes[] = 'last';

	return $classes;
}


add_filter( 'genesis_post_meta', 'be_archive_post_meta' );
/**
 * Archive Post Meta
 * Example of using the post class to customize just teasers
 */
function be_archive_post_meta( $post_meta ) {
	if( in_array( 'teaser', get_post_class() ) )
		$post_meta = '[post_tags before="Tags: "]';
	
	return $post_meta;
}