Drupal 7 theme for specific page
In your module

function custom_theme($existing, $type, $theme, $path){
      return array(
        'mortgage_page' =&gt;  array(
          'template' =&gt; 'theme/mortgage',
          'render element' =&gt; 'page'
        ),
      );
    }

function custom_preprocess_page(&amp;$variables, $hook) {
  if ( preg_match("/mortgage\/.*\/view/", drupal_get_path_alias($_GET['q'])) ) {
   $variables['theme_hook_suggestions'][] = 'mortgage_page';
  }
}


Check for path alias to be correct and change theme_hook_suggestions to your theme.