用户输入撇号后不需要的多个反斜杠

I have this in Wordpress:

<p>Welcome, [insert_php]session_start();
echo $_SESSION['your_org']  = $_GET['your_org'] . " - "; echo $_SESSION['choice']  = $_GET['choice'];
[/insert_php] - <b>Your Design Ideas</b></p>

If a user enters an apostrophe, eg. Bob's as input in 'your_org' variable, I get this as output:

eg. Bob\\\\'s

Have searched and searched for a solution!