#edit-field-website-section-und option:nth-child(2), #edit-field-website-section-und option:nth-child(3), #edit-field-website-section-und option:nth-child(5), #edit-field-website-section-und option:nth-child(9), #edit-field-website-section-und option:nth-child(10), #edit-field-website-section-und option:nth-child(11) { 
    display: none;
}