echo t('Powered by ').'<a href="http://drupal.org/">'.t('Drupal').'</a>'.t(' and ').'<a href="http://www.thebeeblogger.com/">Drupal Theme</a>'.t(' created by ').'vigilianty';

It's not possible to translate each word in this sentence and then get a grammatically correct translation in _most_ languages. Use one string with placeholders instead:

echo t('Powered by <a href="!url">Drupal</a> and <a href="!thebeeblogger_url">Drupal Theme</a> created by !name', array('!url' => 'http://drupal.org/', '!thebeeblogger_url' => 'http://www.thebeeblogger.com/', '!name' => 'Vigilianty'));