Karenderia Multiple Restaurant theme changes

My first choose who worked already with Karenderia Multiple Restaurant,i have some referance website which use same script,i want to do similar search result page! and better home page design,menus,etc Attention this script has no bug! i use it for 2 years,test,change etc and all fine,when you are changing this page,you need to be very carefull to not break any! means i need good expert people! Payment gateway,i will use a local payment gateway,they call it iyzico,will be market place payment gateway entegration,we have already direct iyzico,we need to extent it to market place... How it works it,on seller registration form there is already some info,we can add a few more which iyzico asked such as company iban,id etc... ones user register,this all info should go to iyzico payment gw company as submerchant,here is some info [login to view URL] 1) API Keys You can find your "API Key" and "Security Key" information in your iyico Control Panel ([login to view URL]) in the Settings menu. 2) Integration Documents INTEGRATION DOCUMENTS Do not forget to try out payment after you have completed your integration! Links that can help you in the process: Link to our .NET Client ([login to view URL]). The link for the payment form example in our .NET Client ([login to view URL]) Link for our PHP Client ([login to view URL]). The link for the payment form example in our PHP Client ([login to view URL]) PHP Our client has a link to the example file for the end-user details ([login to view URL]) Link to our Clients in other languages ​​([login to view URL]) In addition, in terms of help, the video at [login to view URL] and about integration you can access detailed information at [login to view URL] This we need to also apply to mobile app since script use mobule and its api mobile app,which fetch date from website...