How to remove sidebar from single blog posts in Zerif
If you want to remove sidebars from your Posts (single) blog posts then this guide is for you. And as we always recommend to everyone, please make sure that you're using a child theme with your Zerif theme before reading this guide.
Copy single.php file from your parent theme to your child theme, and make the replace the following code:
<div class="content-left-wrap col-md-9">
with the following code:
<div class="content-left-wrap col-md-12">
And then delete the following code form the file
<?php zerif_sidebar_trigger(); ?>
Now save the file, and that's all!