will paginate initializer file

application_helper.rb

module ApplicationHelper

  def page_links(pages)
    will_paginate(pages, :class => 'pagination', :inner_window => 2, :outer_window => 0, :renderer => BootstrapLinkRenderer, :previous_label => '«'.html_safe, :next_label => '»'.html_safe)
  end

end

will_paginate.rb

if defined?(WillPaginate)
  module WillPaginate
    module ActiveRecord
      module RelationMethods
        def per(value = nil) per_page(value) end
        def total_count() count end
      end
    end
    module CollectionMethods
      alias_method :num_pages, :total_pages
    end
  end
end

class BootstrapLinkRenderer < ::WillPaginate::ActionView::LinkRenderer
    protected

  def html_container(html)
    tag :div, tag(:ul, html), container_attributes
  end

  def page_number(page)
    tag :li, link(page, page, :rel => rel_value(page)), :class => ('active' if page == current_page)
  end

  def gap
    tag :li, link(super, '#'), :class => 'disabled'
  end

  def previous_or_next_page(page, text, classname)
    tag :li, link(text, page || '#'), :class => [classname[0..3], classname, ('disabled' unless page)].join(' ')
  end
end