Dölja blocktitlar via template.php

template.php

/**
 * Implements template_preprocess_block().
 */
function themename_preprocess_block(&$variables) {
  // Add a title class to the block title.
  $variables['title_attributes_array']['class'] = 'block-title';
 
  // Alter the title for some blocks.
  // Manually configured here, because Features doesn't export block configurations.
  switch ($variables['block']->bid) {
    case 'name-of-block':
      $variables['block']->subject = '';
      break;
  }
}