Display a user's selected checkbox options for a category field type in a front-end Edit Profile form
Try something like this (completely untested):

{# Grab all categories in the group and set variable. #}
{% set categories = craft.categories.group('designCategories') %}

{# Grab the categories Ids that the user already selected #}
{% set userOptionIds = user.designOptions.limit(null).ids() %}

{# Display all category checkboxes in the form, with the logged in user's saved selections already checked.#}
{% for category in categories %}
    &lt;input type="checkbox" id="designOptions" name="fields[designsOptions][]" {% if category.id in userOptionIds %}checked{% endif %} value=" {{ category.id }}"&gt;
        {{ category.title }}
    &lt;/input&gt;
{% endfor %}