gistfile1.builder

def get_bread_crumb(url)
    begin
        breadcrumb = ''
        so_far = '/'
        elements = url.split('/')
        for i in 1...elements.size
        
            so_far += elements[i] + '/'
            
            if elements[i] =~ /^[0-9]*$/
                begin
                    breadcrumb += link_to_if(i != elements.size - 1, eval("#{elements[i - 1].singularize.camelize}.find(#{elements[i]}).name").gsub("_"," ").to_s, so_far)
                rescue
                    breadcrumb += elements[i]
                end
            else
                breadcrumb += link_to_if(i != elements.size - 1,elements[i].gsub("_"," ").titleize, so_far)
            end
            
            breadcrumb += " » " if i != elements.size - 1
        end
        breadcrumb
    rescue
        'Not available'
    end
end

gistfile2.builder

def get_bread_crumb(url)
  breadcrumb = []
  so_far = []
  elements = url.split('/')
  last_element = elements.last

  elements.each_with_index do |element, index|
    so_far << element
    url = so_far.join('/')

    breadcrumb << if element =~ /^[0-9]*$/      
      link_to_if(element != last_element, elements[i-1].constantize.find(element).name.humanize, url) rescue element
    else
      link_to_if(element != last_element, element.titleize, url)
    end
  end
  breadcrumb.join(" &raquo; ")
rescue
    'Not available'
end

I forked your code: https://gist.github.com/jackdesert/5117696

I split out some of your longer lines of code,
and fixed a bug where you are using 'i' instead of 'index'