template.php

/**
 * Implements hook_css_alter().
 */
function THEME_NAME_css_alter(&$css) {
  foreach ($css as &$style) {
    $style['weight'] += $style['group'];
    $style['group'] = CSS_DEFAULT;
    $style['every_page'] = TRUE;
  }
}

/**
 * Implements hook_js_alter().
 */
function THEME_NAME_js_alter(&$javascript) {
  foreach ($javascript as $key => &$script) {
    $script['weight'] += $script['group'];
    $script['group'] = JS_DEFAULT;
    $script['every_page'] = TRUE;
    
    if ($script['type'] === 'file') {
      $filename_min = preg_replace('/.js$/i', '.min.js', $script['data']);
      if (file_exists($filename_min)) {
        $script['data'] = $filename_min;
      }
    }
  }
}