Id objId = 'a0Ci000000vd7xA';
String objName = ((Id)objId).getSobjectType().getDescribe().getName();

Type t = Type.forName(objName); //object name
Sobject  myObj =  (Sobject)t.newInstance();

myObj.emp_name__c = 'test';

SObject record = Id.valueOf('a0Ci000000vd7xA').getSObjectType.newSObject();
record.put('emp_name__c', 'test');

record.put(SomeObject__c.SomeField__c, 'Some Value');

Id objId = 'a0Ci000000vd7xA';
SObject record = objId.getSObjectType().newSObject(objId);

CustomObject__c record = (CustomObject__c)objId.getSObjectType().newSObject(objId);

record.put('Name','New Name Value');