Have some categories NOT linked to a category entry
I think I might have found a solution, although it might not be very elegant :/

So, i'm basically looking to see if a category field has content and then taking out the anchor in the template.

{% if category.practiceIntroText|length %}
    &lt;a href="{{ category.url }}"&gt;
{% endif %}
{{ category.title }}
{% if category.practiceIntroText|length %}
    &lt;/a&gt;
{% endif %}


Same code but making use of the ternary operator:

{% set catWithContent = category.practiceIntroText|length %}

{{ catWithContent ? '&lt;a href="' ~ category.url ~ '"&gt;' }}
{{ category.title }}
{{ catWithContent ? '&lt;/a&gt;' }}