WordPress changing single quotes to double quotes in title and content

by

Add this code your functions.php

Reference : Issue with double dash

remove_filter( 'the_title' , 'wptexturize'  );
remove_filter( 'the_content' , 'wptexturize' );
remove_filter( 'the_excerpt' , 'wptexturize' );
remove_filter( 'comment_text' , 'wptexturize' );
remove_filter( 'list_cats' , 'wptexturize' );