Hello imtiazwighio and welcome to the Dubai visa forums
Yes, there were reports of the AED 10,000 minimum salary requirement for sponsoring a spouse in Dubai
(and the UAE perhaps). I think it dates back to a Federal National Council (FNC) recommendation last year that the minimum salary levels be increased. However, as far as I understand it, the GN report said that the UAE residency law needed to be amended, and given the large number of expat residents on salaries of less than 10k dhs per month who are sponsoring their families, I expect we would have seen much more noise about it if it had already been implemented.
However, check with the Dubai residency department
for official information (do it twice to see if you get consistent info), and let us know what they say
. Or just go ahead and try to obtain the residence permit anyway - probably better to do it sooner than later if the law is going to change. Once it's issued then she's good to stay for 3 years before you have to worry about it again.
Also check with them if salary certificate is enough (it should be) but you should have a labour contract anyway. It's not a good sign if the company hasn't provided you with one.