option_filter.rb

class OptionFilter
  def initialize(default_opts)
    @default_opts = default_opts
  end

  def generate(param_name, label_value_pairs)
    @copy = @default_opts.clone
    @current_param = param_name
    label_value_pairs.each { |pair| yield pair[0], opts_for(pair[1]) }
  end

  private
  def opts_for(value)
    @copy.merge! @current_param => value
  end
end

usage.rb

require 'option_filter'

filter = OptionFilter.new(:hello => 'world', :hoho => 'cur')

filter.generate :hello, [
  ['Recommended', 'world'],
  ['Everything', 'all'],
  ['Latest', 'recent']
] do |name, value|
  #link_to name, blah_path(value)
  puts "#{name}, #{value}"
end