Access Denied After SSL Changes on Resource URL Admin Page
You can override the SSL settings in civicrm.settings.php, which will hopefully be enough to get you back in.

Add the following lines to civicrm.settings.php:

global $civicrm_setting;
$civicrm_setting['CiviCRM Preferences']['verifySSL'] = false;
$civicrm_setting['CiviCRM Preferences']['enableSSL'] = false;


Sources: 


https://wiki.civicrm.org/confluence/display/CRMDOC/Override+CiviCRM+Settings
https://github.com/civicrm/civicrm-core/blob/4.6/settings/Core.setting.php