drupal_get_css -- drupal

    $css = drupal_get_css();
    dpm($css);
    //<style type="text/css" media="all">@import url("http://192.168.1.49/local/sites/all/modules/dev/ctools/css/ctools.css?ntdklu");</style>
//    <style type="text/css" media="all">@import url("http://192.168.1.49/local/sites/all/themes/bartik/css/layout.css?ntdklu");
//@import url("http://192.168.1.49/local/sites/all/themes/bartik/css/style.css?ntdklu");
//@import url("http://192.168.1.49/local/sites/all/themes/bartik/css/colors.css?ntdklu");</style>
//<style type="text/css" media="print">@import url("http://192.168.1.49/local/sites/all/themes/bartik/css/print.css?ntdklu");</style>