[Plugin: Contact Form 7] checkbox field values

Hi,

I’m setting the checkbox values based on a set of categories e.g.

<p><b>Modality</b> (Required)<br /><br />
    [checkbox* article-modality "Acupressure" "Acupuncture" "Alexander Technique" "Aromatherapy" "Art Therapy" "Ayurvedic" "Biofeedback" "Body/Mind Therapy" "Bowen Therapy" "Brain Gym" "Breathwork Therapy" "Chinese Medicine" "Chiropractic Therapy" "Colonics" "Colour Therapy" "Counselling" "Craniosacral Therapy" "Crystal Therapy" "Cupping Therapy" "Dietitian" "Ear Candling" "EFT (Emotional Freedom Technique)" "EMF (Electromagnetic Field Therapy)" "Energy Healing" "Feldenkrais" "Feng Shui" "Flower Essence Therapy" "Gestalt Therapy" "Herbal Medicine" "Holistic Pulsing" "Homeopathy" "Hypnotherapy" "Iridology" "Kinesiology" "Laser Therapy" "Life Coaching" "Lymphatic Drainage" "Macrobiotics" "Magnetic Therapy" "Massage – Chinese" "Massage – Corporate / Workplace" "Massage – Deep Tissue" "Massage – Holistic" "Massage – Infant" "Massage – Pregnancy" "Massage – Remedial" "Massage – Shiatsu" "Massage – Sports" "Massage – Stone Therapy" "Massage – Swedish / Relaxation" "Massage – Thai" "Massage – Therapeutic" "Meditation" "Music Therapy" "Myofascial Release Therapy" "Naturopathy" "Neuromuscular Therapy" "NLP (Neuro-Linguistic Programming)" "Numerology" "Nutrition" "Osteopathy" "Oxygen Therapy" "Personal Training" "Physiotherapy" "Pilates" "Podiatry" "Polarity Therapy" "Psychotherapy" "Qi Gong" "Reconnective Healing" "Reflexology" "Reiki" "Remedial Massage Therapy" "Shamanic Healing" "Shiatsu" "Sound Therapy" "Spiritual Healing" "Tai Chi" "TFT (Thought Field Therapy)" "Time Line Therapy" "Trigger Point Therapy" "Yoga" "Zen"]

But I have to continually make sure the catagories match up & type them in manually.

Is there a way to display the categories using php/wordpress functions? I tried the following but it didn’t work:

<p><b>Modality</b> (Required)<br /><br />
    [checkbox* article-modality <?php wp_list_categories('orderby=name&child_of=15'); ?>]

Thanks,
Mark