Following is the script to add stored procedures in publication using tsql script for transactional replication. It is just same as adding views in publication. You just need to change relevant objects and type in script.

<pre class="brush: plain">
USE PublisherDB
GO

EXEC sp_addarticle 
@publication = N'PublicationName', 
@article = N'ProcedureName', 
@source_owner = N'SchemaName',

@sourceobject = N'ProcedureName', @type = N'proc schema only', @description = N'', @creationscript = N'', @precreationcmd = N'drop', @schemaoption = 0x0000000008000001, @destinationtable = N'ProcedureName', @destination_owner = N'SchemaName', @status = 16 GO

You can refer earlier post to add views in replication here, http://beyondrelational.com/justlearned/posts/701/.aspx