Drupal 7 - Add transformed page title as a body class.

template.php

<?php

/**
 * HTML template preprocessing.
 */
function MYTHEME_preprocess_html(&$variables) {
    // Add the page title as a css class to allow for page specific targetting.
    try {
        if (!drupal_is_front_page()) {
            $title = drupal_get_title();
            $titleClass = trim(strtolower(str_replace(' ', '-', $title)));
            $variables['classes_array'][] = $titleClass;
        }
    } catch (Exception $e) {}
}

replace MYTHEME with the machine(folder) name of your theme.