Same outer structure only one difference between functions

I have many functions that do roughly the same apart from the what variable the modify

struct example
{
    std::string name;
    std::string category;
};

bool updateName(const ObjName &oldname, const ObjName& newName) ...
bool updateCategory(const ObjName &name, Category &cat)
{
    //  boost optional pointing to struct reference
    auto obj = findOjb(name);
    if (rule)
    {
        rule.get().category = cat; // variable name changes 
        return true;
    }
    return false;
}

What I am wondering is what I can do to combine the code ? I suspect it will involve templates maybe traites/functors but I am unsure of how to approach it any ideas ?