Add class to any div in Genesis

genesis_attr_add_class.php

<?php

//* Add class to .site-container
add_filter('genesis_attr_site-container', 'jive_attributes_st_container');
function jive_attributes_st_container($attributes) {
	$attributes['class'] .= ' st-container';
	return $attributes;
}

//* Add class to .site-inner
add_filter('genesis_attr_site-inner', 'jive_attributes_st_inner');
function jive_attributes_st_inner($attributes) {
	$attributes['class'] .= ' st-pusher';
	return $attributes;
}

//* Add class to .sidebar-wrap
add_filter( 'genesis_attr_content-sidebar-wrap', 'jive_attributes_st_content' );
function jive_attributes_st_content( $attributes ) {
	$attributes['class'] = $attributes['class']. ' st-content';
	return $attributes;
}

//* Add class to .content
add_filter( 'genesis_attr_content', 'jive_attributes_st_content_inner' );
function jive_attributes_st_content_inner( $attributes ) {
	$attributes['class'] = $attributes['class']. ' st-content-inner';
	return $attributes;
}