Custom template for displaying inner blog contents
Declare your template using 'theme_suggestion` in your page preprocess function. like the following:

function THEMENAME_preprocess_page(&amp;$vars){
  // Page template suggestion based on node type
  if (!empty($vars['node'])) {
    $node_type = $vars['node']-&gt;type;
    $vars['theme_hook_suggestions'][] = 'page__node__' . $node_type;
  }
}


if your node type is blog then your template will page--node--blog.tpl.php
Don't forget to clear cache after adding this code and your tpl file