Posting to a single category

Hello,

I would like to force the users on our site to only have the option to post into a single category while hiding the others.

In looking through the posts on this section, I’ve found a piece of code that is supposed to do what I need…but it appears things have changed a little in the year since it was posted.

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Replace the line 248 in includes/social-articles-manage-functions.php, for this 2 lines:
$myCategory = get_category_by_slug( ‘YOUR_SLUG_HERE’ );
$category_ids = $myCategory->term_id;
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When looking at line 248 it doesn’t appear to the code that needs to be replaced. My guess is the line number has changed somewhat in the past year. Could you provide me with the code to replace AND the line number?

Thank you

https://wordpress.org/plugins/social-articles/