Remove the Category and Guide Filter

Use CSS to remove the Category and Guide filters on the Search Results page.

To remove the Category and Guide filters on the Search Results page:

Navigate to Site Tools > Control Panel > Branding > Custom Site CSS.

Add the following code to the appropriate custom CSS field:

li.mt-search-filtersV2-classification-article-topic-category, 
li.mt-search-filtersV2-classification-article-topic-guide {
    display: none;
}

If the above CSS does not work, your search filters may be from an older version of the UI. If that is the case, follow the steps below:

Navigate to Site Tools > Control Panel > Branding > Custom Site CSS.

Add the following code to the appropriate custom CSS field:

li.mt-search-filters-classification-article-topic-category, 
li.mt-search-filters-classification-article-topic-guide {
    display: none;
}