PHP Coding add sub destination - ST

I have built a MYSQL PHP travel site listing destinations, Hot deals, accommodation, tours, I have built a simple admin area to add a destination, and to add accommodation tours and hot deals for each destination. I want to be able to add sub-destinations, by adding the option to make a destination belong under a main destination So Like below, If Fiji is click it show the links avalable COOK ISLANDS FIJI -Hot Deals -Accommodation -Tours Image Gallery LORD HOWE ISLAND NEW CALEDONIA NIUE NORFOLK ISLAND SAMOA SOLOMON ISLANDS TAHITI TONGA VANUATU I want to add Sub Destinations so I can do the below if Fiji was clicked, show sub destinations COOK ISLANDS FIJI Coral Coast - Hot Deals - Accommodation - Tours Denarau Island & Nadi - Hot Deals - Accommodation - Tours Mamanuca Islands - Hot Deals - Accommodation - Tours Northern Fijian Island - Hot Deals - Accommodation - Tours Southern Fijian Island - Hot Deals - Accommodation - Tours Yasawa Islands - Hot Deals - Accommodation - Tours Image Gallery LORD HOWE ISLAND NEW CALEDONIA NIUE NORFOLK ISLAND SAMOA SOLOMON ISLANDS TAHITI TONGA VANUATU Atached is the index and the navigation include file and the admin add and edit destination include file In the administrator area a option to make a destination belong to a main destination needs to be added you can see the site at spacifica travel [dot] com ( one word ) Please mention the word destination so I know you have read the brief fast turn around and good qualiy work at a good price I want o be able to see the changes before they go live cpanel access provided