[davidjohnson101]

This worked:

add_action( 'intense_before_main_content', 'intense_before_main_content' );
function intense_before_main_content() {
	echo '<div class="container">';
}

add_action( 'intense_after_main_content', 'intense_after_main_content' );
function intense_after_main_content() {
	echo '</div>';
}