Hongkong Visa for a Lebanese Nationality

The Fillipino wife is exempted from visa to HK for 14 days.

There are two ways for your Lebanese friend and two kids who have Lebanese passport. They can apply at the Chinese Embassy in Lebanon, the following documents are needed:(all in English and in A4 size paper)
(1). Completely-filled application form (HONG KONG VISA APPLICATION FORM) with 2 passport photos
(2). Photocopy of the main information pages of the passport
(3). Invitation letter and detail contact information (telephone number, address, etc.) provided by the inviter in Hong Kong
(4). Bank account statement of the applicant (more than 5,000 U.S Dollars)
(5). Commercial registration in Lebanon or Profession card
(6). Photocopy of the actual airline ticket to Hong Kong

At least 3 weeks is needed for processing.

and they can also apply visa on arrival in HK.