I used the following link
http://processors.wiki.ti.com/index.php?title=WL18xx_AMxxx_platform_integration_guide
And used the prebuilt images to run the WL18xx cape with BBB. It does work well with the samples provide in
http://processors.wiki.ti.com/index.php/WL18xx_Bluetopia_Platform_Manager_Demo_Guide
for bluetooth and I'm also able to get the wifi going. My question is, how can I develop an application to use bluetooth as i'm unable to find libraries and headers for it?